#3f587f
#3f587f converts to rgb(63, 88, 127) and hsl(217, 34%, 37%). Its nearest Tailwind CSS token is slate-600.
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Conversions
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WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 7.21:1 | pass | pass | pass |
| black | 2.91:1 | fail | fail | fail |
| slate-900 | 2.48:1 | fail | fail | fail |
| gray-100 | 6.55:1 | pass | pass | fail |
Ratios are computed from WCAG 2.x relative luminance. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1.
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Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #3f587f.
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Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
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AI prompt snippet
Use #3f587f (rgb(63, 88, 127), nearest Tailwind token slate-600) as an accent. Keep text contrast at least 4.5:1 — this color scores 7.21:1 on white and 2.91:1 on black.
Paste this into ChatGPT, Claude, Cursor, or v0 to use #3f587f with correct contrast constraints. Browse all palette colors.