#0057b8
#0057b8 is rgb(0, 87, 184), or hsl(212, 100%, 36%). The nearest reference Tailwind v4 token is sky-700 (#0069a8), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 6.87:1 | pass | pass | fail |
| black | 3.06:1 | fail | pass | fail |
| slate-900 | 2.60:1 | fail | fail | fail |
| gray-100 | 6.25:1 | 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 #0057b8 in real UI palettes
These colors appear alongside #0057b8 in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #000000
Used together in Swiss International, Swiss Poster.
3.06:1
Not for normal text - #ff0000
Used together in Swiss International, Swiss Poster.
1.72:1
Not for normal text - #ffcc00
Used together in Swiss International, Swiss Poster.
4.55:1
AA normal text - #ffffff
Used together in Swiss International, Swiss Poster.
6.87:1
AA normal text
A readable starting point
white text on #0057b8: 6.87:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #0057b8.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #0057b8 as the accent color, following the Swiss International style: rgb(0, 87, 184), nearest Tailwind token sky-700. Keep text contrast at least 4.5:1 (this color scores 6.87:1 on white, 3.06:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #0057b8 with correct contrast constraints. Browse all palette colors.
Questions about #0057b8
What color is #0057b8?
#0057b8 is rgb(0, 87, 184), or hsl(212, 100%, 36%). The nearest reference Tailwind v4 token is sky-700 (#0069a8), not an exact match.
What text color should I use on #0057b8?
White (#ffffff) has the higher black-or-white contrast against #0057b8: 6.87:1. 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 #0057b8 in Tailwind CSS?
Use bg-[#0057b8], text-[#0057b8], 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.