Color Details and Palettes for #66BB99

Details about the color Electra

Closest web-safe match: #66CC99

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 #66BB99
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About Color Hex #66bb99

The color Electra, with hexadecimal code #66bb99, is categorized under the cyan family—a cool, refreshing hue fundamental to CMYK printing. Cyan evokes clarity, focus, and digital innovation, appearing across tech interfaces and futuristic design systems. Additionally, it evokes emotions such as Softness, Delicacy, Calmness, Relaxation and Friendliness. Cyan or blue-green is associated with healing, water, and tranquility. It can symbolize communication and clarity in various cultures. With a moderate saturation of 38%, it has a softened, muted quality that lends sophistication and works well for backgrounds and secondary elements. With a mid-range lightness of 57%, 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 Softness, Delicacy, Calmness, Relaxation, or Friendliness. It can be effectively used in web design, branding, and marketing materials to attract attention and convey specific messages.

The RGB values for Electra are (102, 187, 153), providing a combination of red: 102, green: 187, and blue: 153. In HSL format, it has a hue of 156.00°, saturation of 38.00%, and lightness of 57.00%.

The HSV representation includes a hue of 156.00°, saturation of 45.00%, and value of 73.00%. Its CMYK composition is cyan: 45.00%, magenta: 0.00%, yellow: 18.00%, and black: 27.00%.

The calculated luminance of #66bb99 is 0.407, 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 #66CC99. Its contrast ratio is 9.13:1 against black and 2.30:1 against white. It works well on dark backgrounds but may be less readable on lighter ones.

In terms of color temperature, #66bb99 reads as cool. When it comes to accessibility, testing against standard guidelines suggests that using black text meets typical WCAG contrast standards. Additionally, the ideal foreground color for improved legibility on #66bb99 is black.

Considering its saturation and lightness, #66bb99 appears more vivid and energetic, making it stand out in designs that aim to capture attention.

History, Usage, Psychology & Design Ideas for #66BB99

Electra (#66BB99) belongs to the Teal 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

Teal—named after the Eurasian teal duck's distinctive head stripe—gained prominence as a design color in the 1990s. However, teal pigments trace back to ancient Egyptian faience, a ceramic technique that produced striking blue-green glazes for amulets and tiles. In contemporary culture, teal ribbons symbolize ovarian cancer awareness and anxiety-disorder advocacy.

Design & Usage Tips

Teal bridges the reliability of blue with the renewal of green, making it versatile across healthcare, education, and technology sectors. Pair teal with coral or warm peach for a modern complementary scheme, or with light gray for a clean, professional interface. Teal works well as both a primary and accent color.

Sitting on the cool side of the spectrum (hue 156°), it promotes a feeling of calm distance and intellectual clarity, which is why cool hues dominate corporate identities, healthcare design, and productivity tools. At 38% saturation, the color has a muted, sophisticated quality that pairs well with bolder accents. It works as a background, a border, or a secondary element in layered compositions.

Psychological Impact

Teal evokes calm confidence, open communication, and clarity of thought. It feels more energetic than navy but more grounded than bright cyan. In branding, teal signals trustworthiness with a creative edge—bridging corporate reliability and startup innovation.

With a mid-range lightness of 57%, 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

Use teal as a hero-section background color paired with white text and photography for a healthcare or wellness brand. Create duotone imagery (teal + coral) for vibrant social media graphics. In dashboards, teal chart lines stand out clearly against white backgrounds.

#66BB99 Color Conversions

Every way to write Electra — copy Electra 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
#66BB99

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(102, 187, 153)

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(156, 38%, 57%)

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(156, 45%, 73%)

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(156 40% 27%)

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(45%, 0%, 18%, 27%)

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(72.87% 0.098 165.84)

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

OKLab Modern
oklab(72.87% -0.095 0.024)

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: 69.94, a: -33.83, b: 9.29

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

LCH Perceptual
L: 69.94, C: 35.08, H: 164.64

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

XYZ CIE Science
X: 29.00, Y: 40.67, Z: 36.46

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
6732697

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

RGB Color Percentages for #66bb99

RGB Color Percentages for Electra (HEX Code: #66bb99) 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 Green, making up 42.31% of the total composition. The complete breakdown of RGB contributions is:

Red:
23.08%
Green:
42.31%
Blue:
34.62%

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

CMYK Ink Levels & Print Guide for #66bb99

CMYK Ink Levels for Electra (HEX Code: #66bb99) provide a breakdown of the percentages of Cyan, Magenta, Yellow, and Black inks needed for accurate print reproduction. The composition of Electra prominently features Cyan, 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: 45.45%, Magenta: 0%, Yellow: 18.18%, and Black: 26.67%.

Luminance & Contrast for #66BB99

Relative luminance gauges how bright Electra 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 0.407
0 · dark1 · light
Aa
Black text 9.13:1
AA AAA Large
Aa
White text 2.30:1
AA AAA Large

Quick CSS Snippets for #66BB99

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

Background background-color: #66BB99;
Text color: #66BB99;
Border border: 2px solid #66BB99;
RGB background-color: rgb(102, 187, 153);
HSL background-color: hsl(156, 38%, 57%);
Variable --color: #66BB99;

#66bb99 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.

#f0f8f5
#d9eee6
#c2e4d6
#abdac7
#94cfb8
#7dc5a8
#66bb99 Original
#579f82
#47836b
#386754
#294b3d
#1a2f26
#0a130f

#66bb99 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.

#66bb99 Original
#bb6889

#66bb99 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.

#66bb99 Original
#68b3bb
#68bb70
#6889bb
#89bb68
#7068bb
#b3bb68

#66bb99 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.

#66bb99 Original
#9a68bb
#bb9a68

#66bb99 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.

#66bb99 Original
#7068bb
#bb6889
#b3bb68

Color Blindness Simulation for #66bb99

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 Electra (#66bb99) 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)

Not Friendly

Protanopia (Red Weakness)

Not Friendly

Tritanopia (Blue-Yellow Weakness)

Friendly

Achromatopsia (Total Color Blindness)

Not Friendly

Color Harmonies for #66bb99

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)

#66BB99 Nearby Colors

A handful of colors just a step away from #66BB99 — 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.

#77ccaa Minted Elegance
#55aa88 Electra
#88ddbb Cabbage
#449977 Natural Orchestra
#55bb99 Electra
#77bb99 Neptune Green
#55bbaa Emerald Bliss
#77bb88 Frog Pond

Colors Similar to #66bb99

These colors are close neighbours of #66BB99 in the RGB color space. Each subtle variation can produce a noticeably different mood in your design while remaining harmonious with the original Cyan tone.

#67bb99 Electra
#66bc99 Electra
#66bb9a Spearmint
#65bb99 Electra
#66ba99 Electra
#66bb98 Electra
#77bb99 Neptune Green
#66cc99 Vegetation
#66bbaa Sereni Teal
#55bb99 Electra
#66aa99 Water Park
#66bb88 Bleached Olive

Looking for more Cyan shades? Browse Cyan colors →

Explore Vibrant Images Featuring Electra (#66bb99)

Discover a vibrant gallery of images that not only showcase the captivating hue of Electra, 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.