#14101F
#4D4365
#8E6BFF
#EEE9FF
#04020CObsidian
#332949Space
#734CDESlate Blue
#D3CEE3Fog
Royal Slate Blue & Space is a monochromatic color palette tagged dark, cold, minimal. A monochromatic set: the same hue family from Obsidian down to Fog. Saturation is moderate, which keeps it flexible for both interfaces and print. The overall temperature is cool.
Color codes click any value to copy
| Swatch | Name | HEX | RGB | HSL | OKLCH |
|---|---|---|---|---|---|
| Obsidian | #04020C | rgb(4, 2, 12) | hsl(252, 71%, 3%) | oklch(10.2% 0.031 294) | |
| Space | #332949 | rgb(51, 41, 73) | hsl(259, 28%, 22%) | oklch(30.8% 0.057 297) | |
| Slate Blue | #734CDE | rgb(115, 76, 222) | hsl(256, 69%, 58%) | oklch(54.2% 0.210 290) | |
| Fog | #D3CEE3 | rgb(211, 206, 227) | hsl(254, 27%, 85%) | oklch(86.2% 0.029 297) |
Why it works and how to use it
It works because the lightness range is wide (3% to 85%), which gives clear hierarchy between background, content and accents. Try it for websites, presentations and branding.
- Background: Fog (#D3CEE3) is the lightest color, so it belongs on large surfaces.
- Text: Obsidian (#04020C) on #D3CEE3 gives 13.45:1, passing WCAG AAA.
- Primary: Slate Blue (#734CDE) is the most saturated mid-tone; use it for buttons and links (3.59:1 against the background, fine for UI elements).
- Accent: Space (#332949) for highlights, badges and hover states.
2 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Obsidian on Fog at 13.45:1.
Preview on a real UI see how the palette feels in context
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Design faster with Royal Slate Blue & Space
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
#04020C
#332949
#734CDE
#D3CEE3
Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#04020C on #D3CEE3 | Aa | 13.45:1 | AAA |
#332949 on #D3CEE3 | Aa | 8.82:1 | AAA |
#04020C on #734CDE | Aa | 3.75:1 | AA large only |
#734CDE on #D3CEE3 | Aa | 3.59:1 | AA large only |
#332949 on #734CDE | Aa | 2.46:1 | Fail |
#04020C on #332949 | Aa | 1.52:1 | Fail |
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