#0B132B
#3B487A
#5C7BA8
#6FFFE9
#0A1024Obsidian
#3A456BCharcoal
#5C7CFABlueberry
#DDE3FFLavender
Nocturne Blue is a vivid monochromatic color palette tagged dark, space, cold. A monochromatic set: the same hue family from Obsidian down to Lavender. 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 | #0A1024 | rgb(10, 16, 36) | hsl(226, 57%, 9%) | oklch(18.0% 0.042 269) | |
| Charcoal | #3A456B | rgb(58, 69, 107) | hsl(227, 30%, 32%) | oklch(39.9% 0.066 271) | |
| Blueberry | #5C7CFA | rgb(92, 124, 250) | hsl(228, 94%, 67%) | oklch(62.8% 0.191 269) | |
| Lavender | #DDE3FF | rgb(221, 227, 255) | hsl(229, 100%, 93%) | oklch(92.0% 0.039 276) |
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 (93% down to 9% lightness). A natural fit for websites, presentations and branding.
- Background: Lavender (#DDE3FF) is the lightest color, so it belongs on large surfaces.
- Text: Obsidian (#0A1024) on #DDE3FF gives 14.84:1, passing WCAG AAA.
- Primary: Blueberry (#5C7CFA) is the most saturated mid-tone; use it for buttons and links with a border or a darker shade for contrast.
- Accent: Charcoal (#3A456B) for highlights, badges and hover states.
3 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Obsidian on Lavender at 14.84:1.
Preview on a real UI see how the palette feels in context
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Design faster with Nocturne Blue
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
#0A1024
#3A456B
#5C7CFA
#DDE3FF
Color-blind check: all four colors stay distinguishable under protanopia, deuteranopia and tritanopia.
Contrast check WCAG ratios between palette colors
| Pair | Sample | Ratio | Level |
|---|---|---|---|
#0A1024 on #DDE3FF | Aa | 14.84:1 | AAA |
#3A456B on #DDE3FF | Aa | 7.36:1 | AAA |
#0A1024 on #5C7CFA | Aa | 5.14:1 | AA |
#5C7CFA on #DDE3FF | Aa | 2.89:1 | Fail |
#3A456B on #5C7CFA | Aa | 2.55:1 | Fail |
#0A1024 on #3A456B | Aa | 2.02:1 | Fail |
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