This tool brings together—all in one place—the functions I rely on when building color palettes for websites and presentations.
- OKLCH
- oklch() color notation is supported by all modern browsers.
- OKLCH’s lightness, chroma, and hue are calibrated to human perception, resulting in visually balanced color combinations.
- OKLCH simplifies working with Display P3 colors.
- Alpha (opacity) control for text color.
- Drag-and-drop scratchpad for saving colors—no need to write down values and re-enter them later.
- Sliders for fine-tuning color adjustments—I often tweak lightness to refine a color.
- Color schemes for exploring related hues on the color wheel.
This is an updated version of the contrast checker I originally created in 2013 to address presentation issues (think gray text on a white background), but found myself frequently using it for website colors.
Legacy version: www.sbwfc.co.kr/legacy-contrast-checker
I hope you find it helpful in your design work.
Cheers — SBF Consulting