#10002B
#5A189A
#9D4EDD
#E0AAFF
#09022EObsidian
#4823A4Indigo
#8658ECSlate Blue
#CDB4FFMauve
Royal Slate Blue & Indigo is a vivid monochromatic color palette tagged cyberpunk, dark, vibrant. A monochromatic set: the same hue family from Obsidian down to Mauve. 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 |
|---|---|---|---|---|---|
| Obsidian | #09022E | rgb(9, 2, 46) | hsl(250, 92%, 9%) | oklch(15.4% 0.085 280) | |
| Indigo | #4823A4 | rgb(72, 35, 164) | hsl(257, 65%, 39%) | oklch(39.7% 0.190 287) | |
| Slate Blue | #8658EC | rgb(134, 88, 236) | hsl(259, 80%, 64%) | oklch(58.8% 0.212 293) | |
| Mauve | #CDB4FF | rgb(205, 180, 255) | hsl(260, 100%, 85%) | oklch(81.8% 0.107 299) |
Why it works and how to use it
The palette holds together thanks to its monochromatic hue relationship and a strong light-to-dark ladder (85% down to 9% lightness). A natural fit for websites, presentations and branding.
- Background: Mauve (#CDB4FF) is the lightest color, so it belongs on large surfaces.
- Text: Obsidian (#09022E) on #CDB4FF gives 10.92:1, passing WCAG AAA.
- Primary: Slate Blue (#8658EC) is the most saturated mid-tone; use it for buttons and links with a border or a darker shade for contrast.
- Accent: Indigo (#4823A4) for highlights, badges and hover states.
2 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Obsidian on Mauve at 10.92:1.
Preview on a real UI see how the palette feels in context
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Design faster with Royal Slate Blue & Indigo
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
#09022E
#4823A4
#8658EC
#CDB4FF
Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#09022E on #CDB4FF | Aa | 10.92:1 | AAA |
#4823A4 on #CDB4FF | Aa | 5.64:1 | AA |
#09022E on #8658EC | Aa | 4.36:1 | AA large only |
#8658EC on #CDB4FF | Aa | 2.5:1 | Fail |
#4823A4 on #8658EC | Aa | 2.25:1 | Fail |
#09022E on #4823A4 | Aa | 1.94:1 | Fail |
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