#040b2b
#040b2b converts to rgb(4, 11, 43) and hsl(229, 83%, 9%). Its nearest Tailwind CSS token is slate-950.
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Conversions
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WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 19.30:1 | pass | pass | pass |
| black | 1.09:1 | fail | fail | fail |
| slate-900 | 1.08:1 | fail | fail | fail |
| gray-100 | 17.54:1 | pass | pass | pass |
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 #040b2b.
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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 #040b2b (rgb(4, 11, 43), nearest Tailwind token slate-950) as an accent. Keep text contrast at least 4.5:1 — this color scores 19.3:1 on white and 1.09:1 on black.
Paste this into ChatGPT, Claude, Cursor, or v0 to use #040b2b with correct contrast constraints. Browse all palette colors.