Lorem ipsum dolor sit amet, consectetur adipiscing elit. Phasellus nec iaculis mauris.
@bulmaio. #css #responsive
See your chosen color in action, test accessibility, and explore variations.
How to use: Select a color using the picker or enter a hex code, choose how to apply it (Primary, Accent, or Background), and see how it looks across various UI elements. Use the sliders to adjust lightness and saturation, toggle dark mode, and test color blindness simulations for accessibility.
Sample text using the selected color.
Card Title
A color simulator lets you apply a color to real UI components—buttons, cards, forms, navigation bars, tags, and notifications—so you can judge how it performs before writing a single line of code. Instead of guessing how a HEX value will look across an interface, this color preview tool renders it on common design patterns in both light and dark themes, checks WCAG 2.2 contrast ratios, and simulates color vision deficiencies—all in one workflow.
Static color swatches tell you very little about real-world usability. A color that looks balanced on a white card may fail miserably as a button label on a dark background. This tool removes that uncertainty by placing your chosen value across diverse UI elements simultaneously, so you spot problems early. The dark mode color preview is especially valuable: WCAG requires a minimum contrast ratio of 4.5:1 for normal text, and many colors that pass on light surfaces fail on dark ones.
Designers can validate brand colors before handoff, developers can copy ready-to-paste CSS tokens, and accessibility professionals can confirm compliance without switching between separate tools. If you need to verify exact font-size and weight pairings, run them through the contrast checker for a detailed report. To test an entire palette at once, use the palette accessibility matrix.
Roughly 8% of men and 0.5% of women experience some form of color vision deficiency. The built-in color blindness simulation previews four common types—Protanopia, Deuteranopia, Tritanopia, and Achromatopsia—directly on your UI mockup, helping you spot problematic pairings like red-green status indicators. This aligns with WCAG Success Criterion 1.4.1, which requires that color is not the only visual means of conveying information. For a deeper audit with your own images, the dedicated color blindness simulator offers side-by-side comparisons and downloadable results.
Start by testing your primary brand color at its intended role (button fill, link text, or surface), then switch to dark mode to catch hidden failures. If a color passes contrast on one theme but not the other, adjust lightness rather than hue—this keeps brand identity intact while meeting accessibility thresholds. When you are ready to expand a single color into a full design-system ramp, the Tailwind scale generator builds perceptually uniform 50–900 scales from any base value.