#66508f
#66508f is rgb(102, 80, 143), or hsl(261, 28%, 44%). The nearest reference Tailwind v4 token is slate-600 (#45556c), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 6.75:1 | pass | pass | fail |
| black | 3.11:1 | fail | pass | fail |
| slate-900 | 2.64:1 | fail | fail | fail |
| gray-100 | 6.14:1 | pass | pass | fail |
Ratios use WCAG relative luminance for opaque sRGB colors. Normal text requires 4.5:1, or 7:1 at AAA. Large text requires 3:1: at least 24 CSS pixels, or about 18.67 CSS pixels when bold. Pass/fail uses the unrounded ratio. Contrast alone is not a full accessibility assessment.
Colors paired with #66508f in real UI palettes
These colors appear alongside #66508f in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #cbefdf
Used together in Pastel App UI.
5.45:1
AA normal text - #d9c7ff
Used together in Pastel App UI.
4.36:1
Not for normal text - #ffb5a7
Used together in Pastel App UI.
3.99:1
Not for normal text - #ffe49a
Used together in Pastel App UI.
5.41:1
AA normal text - #fff8f0
Used together in Pastel App UI.
6.41:1
AA normal text
A readable starting point
white text on #66508f: 6.75:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #66508f.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #66508f as the primary color, following the Pastel App UI style: rgb(102, 80, 143), nearest Tailwind token slate-600. Keep text contrast at least 4.5:1 (this color scores 6.75:1 on white, 3.11:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #66508f with correct contrast constraints. Browse all palette colors.
Questions about #66508f
What color is #66508f?
#66508f is rgb(102, 80, 143), or hsl(261, 28%, 44%). The nearest reference Tailwind v4 token is slate-600 (#45556c), not an exact match.
What text color should I use on #66508f?
White (#ffffff) has the higher black-or-white contrast against #66508f: 6.75:1. This calculation assumes opaque, flat sRGB colors. Normal text requires 4.5:1 and large text 3:1 under WCAG 2.2 SC 1.4.3; it is not a complete accessibility assessment.
How can I use exactly #66508f in Tailwind CSS?
Use bg-[#66508f], text-[#66508f], or a CSS custom property instead of substituting a nearby named token. The reference palette is Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex; newer Tailwind versions and custom themes can differ.
Sources and calculation limits
Reference palette: Tailwind CSS 4.1.18, converted from OKLCH to sRGB hex. Named tokens are versioned approximations; use the exact hex utilities when matching an existing design. Palette pairings come from the linked StyleKit definitions, not external popularity or preference data.