#1c00a7
#1c00a7 converts to rgb(28, 0, 167) and hsl(250, 100%, 33%). Its nearest Tailwind CSS token is indigo-800.
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Conversions
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WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 13.06:1 | pass | pass | pass |
| black | 1.61:1 | fail | fail | fail |
| slate-900 | 1.37:1 | fail | fail | fail |
| gray-100 | 11.87:1 | 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 #1c00a7.
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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 #1c00a7 (rgb(28, 0, 167), nearest Tailwind token indigo-800) as an accent. Keep text contrast at least 4.5:1 — this color scores 13.06:1 on white and 1.61:1 on black.
Paste this into ChatGPT, Claude, Cursor, or v0 to use #1c00a7 with correct contrast constraints. Browse all palette colors.