#3498db
#3498db is rgb(52, 152, 219), or hsl(204, 70%, 53%). The nearest reference Tailwind v4 token is sky-500 (#00a6f4), not an exact match.
Conversions
WCAG contrast
| Background | Ratio | AA text | AA large | AAA text |
|---|---|---|---|---|
| white | 3.15:1 | fail | pass | fail |
| black | 6.66:1 | pass | pass | fail |
| slate-900 | 5.66:1 | pass | pass | fail |
| gray-100 | 2.87:1 | fail | fail | 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 #3498db in real UI palettes
These colors appear alongside #3498db in StyleKit's curated palettes. Co-occurrence is not a promise of text readability; each pair includes its measured contrast.
- #e74c3c
Used together in Collage Art, Sketch Style.
1.21:1
Not for normal text - #f39c12
Used together in Collage Art, Sketch Style.
1.44:1
Not for normal text - #f5f0e8
Used together in Collage Art, Sketch Style.
2.78:1
Not for normal text - #27ae60
Used together in Sketch Style.
1.10:1
Not for normal text - #2c2c2c
Used together in Sketch Style.
4.43:1
Not for normal text - #2d2d2d
Used together in Collage Art.
4.37:1
Not for normal text
A readable starting point
black text on #3498db: 6.66:1 contrast.
Design styles using this color
Tints and shades
Lightness ladder in HSL space, from the lightest tint to the darkest shade of #3498db.
Similar colors in the library
Nearest swatches by perceptual OKLab distance across all curated style palettes.
AI prompt snippet
Use #3498db as the accent color, following the Collage Art style: rgb(52, 152, 219), nearest Tailwind token sky-500. Keep text contrast at least 4.5:1 (this color scores 3.15:1 on white, 6.66:1 on black).
Paste this into ChatGPT, Claude, Cursor, or v0 to use #3498db with correct contrast constraints. Browse all palette colors.
Questions about #3498db
What color is #3498db?
#3498db is rgb(52, 152, 219), or hsl(204, 70%, 53%). The nearest reference Tailwind v4 token is sky-500 (#00a6f4), not an exact match.
What text color should I use on #3498db?
Black (#000000) has the higher black-or-white contrast against #3498db: 6.66:1. 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 #3498db in Tailwind CSS?
Use bg-[#3498db], text-[#3498db], 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.