#006D77
#83C5BE
#EDF6F9
#FFDDD2
#37456ACharcoal
#5170A3Steel Blue
#C8E0C6Bone
#FBF8F1Snow
Cool Steel Blue & Charcoal is a split color palette tagged muted, cold, beige. The hues span about 109°, enough contrast to create a focal point without the harshness of true complements. Neither washed out nor loud, it adapts to most contexts. Warm and cool hues are mixed, which adds depth.
Color codes click any value to copy
| Swatch | Name | HEX | RGB | HSL | OKLCH |
|---|---|---|---|---|---|
| Charcoal | #37456A | rgb(55, 69, 106) | hsl(224, 32%, 32%) | oklch(39.6% 0.066 268) | |
| Steel Blue | #5170A3 | rgb(81, 112, 163) | hsl(217, 34%, 48%) | oklch(54.4% 0.088 260) | |
| Bone | #C8E0C6 | rgb(200, 224, 198) | hsl(115, 30%, 83%) | oklch(88.2% 0.043 143) | |
| Snow | #FBF8F1 | rgb(251, 248, 241) | hsl(42, 56%, 96%) | oklch(98.0% 0.010 87) |
Why it works and how to use it
The palette holds together thanks to its split hue relationship and a strong light-to-dark ladder (96% down to 32% lightness). A natural fit for websites, presentations and branding.
- Background: Snow (#FBF8F1) is the lightest color, so it belongs on large surfaces.
- Text: Charcoal (#37456A) on #FBF8F1 gives 8.91:1, passing WCAG AAA.
- Primary: Steel Blue (#5170A3) is the most saturated mid-tone; use it for buttons and links (4.72:1 against the background, fine for UI elements).
- Accent: Bone (#C8E0C6) for highlights, badges and hover states.
3 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Charcoal on Snow at 8.91:1.
Preview on a real UI see how the palette feels in context
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Design faster with Cool Steel Blue & Charcoal
A palette preview that turns four colors into a page, so you can judge hierarchy, contrast and mood before you commit.
Primary action SecondaryCard title
Card title
Card title
Roles are assigned by lightness.
Color blindness simulation
#37456A
#5170A3
#C8E0C6
#FBF8F1
Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#37456A on #FBF8F1 | Aa | 8.91:1 | AAA |
#37456A on #C8E0C6 | Aa | 6.72:1 | AA |
#5170A3 on #FBF8F1 | Aa | 4.72:1 | AA |
#5170A3 on #C8E0C6 | Aa | 3.56:1 | AA large only |
#37456A on #5170A3 | Aa | 1.89:1 | Fail |
#C8E0C6 on #FBF8F1 | Aa | 1.33:1 | Fail |
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