Color Details and Palettes for #423BCD

Details about the color Royal Nightcore

Closest web-safe match: #3333CC

Use this color in our tools

Every tool opens preloaded with #423BCD — pick where to take it next.

 #423BCD
Simulate color Preview this color on real UI components Check contrast Check WCAG contrast for this color Generate harmony Build a 5-color harmony from this color Build a gradient Use this color as a gradient stop Convert formats View HEX, RGB, HSL, HSV, CMYK, OKLCH Color blindness Preview this color across vision types Mix with another Blend this color with another Find closest Pantone Approximate Pantone Solid Coated match

About Color Hex #423bcd

The color Royal Nightcore, with hexadecimal code #423bcd, belongs to the blue color family, the world's most universally preferred hue. Blue projects trust, stability, and intellectual calm, which is why it dominates corporate, financial, and technology branding worldwide. Additionally, it evokes emotions such as Trust, Peace, Loyalty, Integrity and Tranquility. Blue signifies tranquility and stability. In Middle Eastern cultures, it can also represent protection against the evil eye, while in Western cultures, it symbolizes calmness and reliability. At 59% saturation, this color is clearly chromatic yet balanced—colorful enough to be distinctive without overwhelming adjacent content. With a mid-range lightness of 52%, it offers excellent versatility—readable as text on light backgrounds and visible as an element on dark ones. This color is ideal for designs that aim to express Trust, Peace, Loyalty, Integrity, or Tranquility. It can be effectively used in web design, branding, and marketing materials to attract attention and convey specific messages.

The RGB values for Royal Nightcore are (66, 59, 205), providing a combination of red: 66, green: 59, and blue: 205. In HSL format, it has a hue of 243.00°, saturation of 59.00%, and lightness of 52.00%.

The HSV representation includes a hue of 243.00°, saturation of 71.00%, and value of 80.00%. Its CMYK composition is cyan: 68.00%, magenta: 71.00%, yellow: 0.00%, and black: 20.00%.

The calculated luminance of #423bcd is 0.087, offering a brightness level suitable for various design requirements.

This color is not part of the web-safe color palette. The closest web-safe color to this is the color HEX #3333CC. Its contrast ratio is 2.74:1 against black and 7.67:1 against white. It works well on light backgrounds but may be challenging on darker ones.

In terms of color temperature, #423bcd reads as cool. When it comes to accessibility, testing against standard guidelines suggests that using white text meets typical WCAG contrast standards. Additionally, the ideal foreground color for improved legibility on #423bcd is white.

Considering its saturation and lightness, #423bcd appears more vivid and energetic, making it stand out in designs that aim to capture attention.

History, Usage, Psychology & Design Ideas for #423BCD

Royal Nightcore (#423BCD) belongs to the Blue color family.

With moderate saturation and balanced lightness, this muted tone feels sophisticated and understated. Muted hues like this excel in editorial design, professional portfolios, and interior spaces that seek calm refinement.

Historical Background

Blue's scarcity in nature made it a late addition to human color vocabulary—Homer's 'wine-dark sea' notably omits the word blue entirely. The breakthrough came with Egyptian Blue (~2200 BC) and later ultramarine from Afghan lapis lazuli, which Medieval artists hoarded for divine subjects. Synthetic ultramarine (1826) and cobalt blue democratized the color, enabling Impressionists like Monet and Renoir to paint blue-drenched landscapes affordably.

Design & Usage Tips

Blue is the most universally liked color and dominates corporate branding (Facebook, LinkedIn, IBM, Samsung). Use it to establish trust, competence, and professionalism. Lighter blues suit wellness and social apps, while darker blues convey authority and security. Avoid using blue for food branding—it suppresses appetite.

Sitting on the cool side of the spectrum (hue 243°), it promotes a feeling of calm distance and intellectual clarity, which is why cool hues dominate corporate identities, healthcare design, and productivity tools. With 59% saturation, it occupies a comfortable middle ground: colorful enough to be distinctive, yet restrained enough for extended reading or large surface areas.

Psychological Impact

Blue lowers blood pressure and heart rate, promoting calm and focused thought. It signals reliability and integrity, which is why it is the default choice for banks, insurance companies, and government institutions. In UX, blue links and buttons feel intuitive because users have been trained by decades of web convention.

With a mid-range lightness of 52%, this tone is highly versatile: dark enough to serve as body text on white, yet light enough to stand out on charcoal or navy backgrounds.

Creative Design Ideas

Pair classic blue (#0047AB) with warm amber for a nautical or heritage brand. Use gradient blues (light-to-dark, top-to-bottom) for app onboarding screens that feel expansive and inviting. In data dashboards, blue is the safest primary chart color—it's distinct, professional, and colorblind-friendly.

#423BCD Color Conversions

Every way to write Royal Nightcore — copy Royal Nightcore as RGB, HSL, HSV, HWB, CMYK, OKLCH, OKLab, CIELAB, LCH, XYZ or a decimal integer. One-tap copy on every format; tap on any card to learn what it is and when to use it.

12 formats
HEX Web
#423BCD

Hexadecimal is the web’s universal color notation — two digits each for red, green and blue. Drop it straight into HTML, CSS or any design tool.

RGB Screen
rgb(66, 59, 205)

RGB is the additive Red-Green-Blue model every screen uses to emit light. The default choice for websites, apps and on-screen UI.

HSL Web
hsl(243, 59%, 52%)

HSL breaks a color into Hue, Saturation and Lightness — the most intuitive way to lighten, darken or mute a color in CSS.

HSV HSB Design
hsv(243, 71%, 80%)

HSV (also called HSB) maps Hue, Saturation and Value/Brightness. It is the model behind the color pickers in Photoshop, Figma and most design apps.

HWB CSS 4
hwb(243 23% 20%)

HWB blends a pure hue with Whiteness and Blackness — a painter-friendly model added in CSS Color 4 for quick tints and shades.

CMYK Print
cmyk(68%, 71%, 0%, 20%)

CMYK is the subtractive Cyan-Magenta-Yellow-Black ink model. Use these values when preparing artwork for a printer or commercial press.

OKLCH Modern
oklch(46.33% 0.215 276.03)

OKLCH is a modern, perceptually-uniform space (Lightness, Chroma, Hue). It powers smooth gradients and accessible palettes in today’s CSS.

OKLab Modern
oklab(46.33% 0.023 -0.214)

OKLab is the Cartesian form of OKLCH — ideal for blending and interpolating colors without the muddy midpoints older spaces produce.

CIELAB L*a*b* Perceptual
L: 35.39, a: 47.68, b: -74.13

CIELAB is a device-independent, perceptually-uniform space. It is the standard for measuring color difference (ΔE) and matching across devices.

LCH Perceptual
L: 35.39, C: 88.14, H: 302.75

LCH is CIELAB in cylindrical form — Lightness, Chroma and Hue — letting you adjust vividness and hue while staying perceptually even.

XYZ CIE Science
X: 14.83, Y: 8.69, Z: 58.65

CIE XYZ is the 1931 master space that underpins every other model here — the scientific bridge used to convert between color systems.

Decimal int Code
4340685

The 24-bit integer value of the color — handy for databases, APIs, game engines and low-level graphics code.

RGB Color Percentages for #423bcd

RGB Color Percentages for Royal Nightcore (HEX Code: #423bcd) display the relative contribution of Red, Green, and Blue in forming the color. Understanding these percentages provides insight into the color's visual balance and primary components.

This color is primarily dominated by Blue, making up 62.12% of the total composition. The complete breakdown of RGB contributions is:

Red:
20%
Green:
17.88%
Blue:
62.12%

This analysis highlights the influence of each primary color, offering a deeper understanding of the visual characteristics of Royal Nightcore.

CMYK Ink Levels & Print Guide for #423bcd

CMYK Ink Levels for Royal Nightcore (HEX Code: #423bcd) provide a breakdown of the percentages of Cyan, Magenta, Yellow, and Black inks needed for accurate print reproduction. The composition of Royal Nightcore prominently features Magenta, reflecting its dominant color characteristic. This information is invaluable for optimizing ink usage and achieving precise color results in printed materials.

The exact CMYK values are: Cyan: 67.8%, Magenta: 71.22%, Yellow: 0%, and Black: 19.61%.

Luminance & Contrast for #423BCD

Relative luminance gauges how bright Royal Nightcore is, while the WCAG contrast ratios show how legible black or white text is on it — and which accessibility levels (AA / AAA) it passes.

Relative luminance 0.087
0 · dark1 · light
Aa
Black text 2.74:1
AA AAA Large
Aa
White text 7.67:1
AA AAA Large

Quick CSS Snippets for #423BCD

Copy-and-paste CSS for Royal Nightcore — backgrounds, text, borders and a custom property. Each line is ready to drop into your stylesheet.

Background background-color: #423BCD;
Text color: #423BCD;
Border border: 2px solid #423BCD;
RGB background-color: rgb(66, 59, 205);
HSL background-color: hsl(243, 59%, 52%);
Variable --color: #423BCD;

#423bcd Monochrome Palette

The Monochrome Palette consists of shades created by adjusting the brightness. These include lighter, original, and darker shades of the color. This layout helps to visualize the color's range and its potential use in design.

#ecebfa
#d0cef3
#b3b1eb
#9793e4
#7b76dc
#5e58d5
#423bcd Original
#3832ae
#2e2990
#242071
#1a1852
#110f33
#070615

#423bcd Complementary Palette

The Complementary Palette is made up of two colors that sit opposite each other on the color wheel. These colors create high contrast and vibrant designs, making them perfect for attention-grabbing elements and dynamic visuals.

#423bcd Original
#c6cd3c

#423bcd Analogic Palette

The Analogic Palette consists of colors that are next to each other on the color wheel. These colors typically create harmonious and subtle designs, often used to evoke calmness and unity in your visual projects.

#423bcd Original
#8c3ccd
#3c7dcd
#cd3cc6
#3cc6cd
#cd3c7d
#3ccd8c

#423bcd Triadic Palette

The Triadic Palette is made up of three colors evenly spaced on the color wheel. This combination provides a vibrant and balanced color scheme, often used for dynamic and energetic designs while maintaining harmony.

#423bcd Original
#cd443c
#3ccd44

#423bcd Quad Palette

The Quad Palette, also known as tetradic, consists of four colors evenly spaced on the color wheel. This combination offers a diverse and bold color scheme, ideal for creating rich, complex designs with multiple accents while still maintaining balance.

#423bcd Original
#cd3c7d
#c6cd3c
#3ccd8c

Color Blindness Simulation for #423bcd

Colors are perceived differently by individuals with various forms of color blindness. Use the dropdown below to see how this color may look through the eyes of someone with color vision deficiency. Explore how Royal Nightcore (#423bcd) might appear to people with different visual experiences, and gain deeper insights into color accessibility for your designs!

Each color box displays a "Friendly" or "Not Friendly" tag in the bottom-right corner. A "Friendly" tag indicates that the color difference is distinguishable to individuals with the specific type of color blindness. Conversely, a "Not Friendly" tag means that the color difference might not be distinguishable, potentially causing accessibility issues in your design.

Normal Vision

Deuteranopia (Green Weakness)

Friendly

Protanopia (Red Weakness)

Friendly

Tritanopia (Blue-Yellow Weakness)

Not Friendly

Achromatopsia (Total Color Blindness)

Not Friendly

Color Harmonies for #423bcd

Color harmonies refer to the visually pleasing combinations of colors that are derived from specific relationships on the color wheel. These harmonious schemes, such as complementary, triadic, and analogous colors, create a balanced and engaging visual experience in design.

Complementary

Analogous

Triadic

Tetradic (Quad)

#423BCD Nearby Colors

A handful of colors just a step away from #423BCD — each one nudges the brightness, richness, or shade a little while still feeling like the same color. Use the buttons on any swatch to copy its hex or open its full color page.

#5544dd Blurple
#2233bb Blue Screen of Death
#6655ee Candy Grape Fizz
#0022aa Dark Galaxy
#3333dd Slice of Heaven
#4444bb Royal Nightcore
#7722bb Fuchsia Nebula
#0044dd Flying Fish Blue

Colors Similar to #423bcd

These colors are close neighbours of #423BCD in the RGB color space. Each subtle variation can produce a noticeably different mood in your design while remaining harmonious with the original Blue tone.

#433bcd Royal Nightcore
#423ccd Royal Nightcore
#423bce Royal Nightcore
#413bcd Royal Nightcore
#423acd Royal Nightcore
#423bcc Royal Nightcore
#533bcd Blurple
#424ccd Warm Blue
#423bde Blurple
#313bcd Sapphire Glitter
#422acd Lapis on Neptune
#423bbc Royal Nightcore

Looking for more Blue shades? Browse Blue colors →

Explore Vibrant Images Featuring Royal Nightcore (#423bcd)

Discover a vibrant gallery of images that not only showcase the captivating hue of Royal Nightcore, but also embody its unique mood and personality. Each carefully curated photo is selected to highlight the richness and diversity of this color, offering inspiration for design, art, and creative projects.