#121016
#54149C
#693B79
#5B9FFF
#003439Gunmetal
#006857Spruce
#55709FSteel Blue
#008FC2Steel Blue
Astro Steel Blue & Spruce is a vivid dark, analogous color palette tagged space, dark, cold. Analogous neighbors on the wheel (Gunmetal, Spruce, Steel Blue) give it a natural, low-tension flow. Saturation runs high, so use the brightest color sparingly and let the others carry the surface area. The overall temperature is cool.
Color codes click any value to copy
| Swatch | Name | HEX | RGB | HSL | OKLCH |
|---|---|---|---|---|---|
| Gunmetal | #003439 | rgb(0, 52, 57) | hsl(185, 100%, 11%) | oklch(29.7% 0.051 205) | |
| Spruce | #006857 | rgb(0, 104, 87) | hsl(170, 100%, 20%) | oklch(46.2% 0.086 176) | |
| Steel Blue | #55709F | rgb(85, 112, 159) | hsl(218, 30%, 48%) | oklch(54.4% 0.081 261) | |
| Steel Blue | #008FC2 | rgb(0, 143, 194) | hsl(196, 100%, 38%) | oklch(61.1% 0.126 233) |
Why it works and how to use it
With 4 chromatic colors, Spruce takes the lead while the rest support. Lightness runs from 11% to 48%. Well suited to dark-mode interfaces and gaming.
- Background: Steel Blue (#008FC2) is the lightest color, so it belongs on large surfaces.
- Text: Gunmetal (#003439) on #008FC2 gives 3.68:1, enough for large headings only.
- Primary: Spruce (#006857) is the most saturated mid-tone; use it for buttons and links with a border or a darker shade for contrast.
- Accent: Steel Blue (#55709F) for highlights, badges and hover states.
No pair inside the palette reaches 4.5:1, so add black or white for body text.
Preview on a real UI see how the palette feels in context
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Design faster with Astro Steel Blue & Spruce
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
#003439
#006857
#55709F
#008FC2
Color-blind check: under deuteranopia and tritanopia, Steel Blue and Steel Blue become hard to tell apart, so do not rely on that pair alone to carry meaning.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#003439 on #008FC2 | Aa | 3.68:1 | AA large only |
#003439 on #55709F | Aa | 2.71:1 | Fail |
#003439 on #006857 | Aa | 2.01:1 | Fail |
#006857 on #008FC2 | Aa | 1.83:1 | Fail |
#55709F on #008FC2 | Aa | 1.36:1 | Fail |
#006857 on #55709F | Aa | 1.35:1 | Fail |
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