#635bff
#635bff is rgb(99, 91, 255), or hsl(243, 100%, 68%). The nearest reference Tailwind v4 token is indigo-500 (#615fff), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 4.70:1 | pass | pass | fail |
| black | 4.47:1 | fail | pass | fail |
| slate-900 | 3.80:1 | fail | pass | fail |
| gray-100 | 4.27:1 | fail | 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 #635bff in real UI palettes
These colors appear alongside #635bff in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #00d4ff
Used together in Stripe Style.
2.65:1
Not for normal text - #0a2540
Used together in Stripe Style.
3.31:1
Not for normal text - #7a73ff
Used together in Stripe Style.
1.28:1
Not for normal text - #80e9ff
Used together in Stripe Style.
3.36:1
Not for normal text
A readable starting point
white text on #635bff: 4.70:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #635bff.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #635bff as the primary color, following the Stripe Style style: rgb(99, 91, 255), nearest Tailwind token indigo-500. Keep text contrast at least 4.5:1 (this color scores 4.7:1 on white, 4.47:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #635bff with correct contrast constraints. Browse all palette colors.
Questions about #635bff
What color is #635bff?
#635bff is rgb(99, 91, 255), or hsl(243, 100%, 68%). The nearest reference Tailwind v4 token is indigo-500 (#615fff), not an exact match.
What text color should I use on #635bff?
White (#ffffff) has the higher black-or-white contrast against #635bff: 4.70:1. 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 #635bff in Tailwind CSS?
Use bg-[#635bff], text-[#635bff], 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.