What are the hex codes in the Nocturne Blue palette?

The Nocturne Blue color palette consists of Obsidian #0A1024, Charcoal #3A456B, Blueberry #5C7CFA, Lavender #DDE3FF.

How should I use the Nocturne Blue palette on a website?

Use Lavender #DDE3FF as the background, Obsidian #0A1024 for text, Blueberry #5C7CFA for buttons and links, and Charcoal #3A456B for accents. 3 of 6 color pairs pass WCAG AA (4.5:1); the strongest is Obsidian on Lavender at 14.84:1.

Which colors in Nocturne Blue have enough contrast for text?

The highest-contrast pair is #0A1024 on #DDE3FF with a ratio of 14.84:1, which passes WCAG AA for normal text.

#0A1024Obsidian

#3A456BCharcoal

#5C7CFABlueberry

#DDE3FFLavender

Nocturne Blue color palette

Dark Space Cold Black Blue

Color codes click any value to copy

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

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.

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

BrandFeaturesPricingBlogGet started

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 Secondary

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.

Palette card

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

:root {
  --obsidian: #0A1024;
  --charcoal: #3A456B;
  --blueberry: #5C7CFA;
  --lavender: #DDE3FF;
}

$obsidian: #0A1024;
$charcoal: #3A456B;
$blueberry: #5C7CFA;
$lavender: #DDE3FF;

// tailwind.config.js
module.exports = {
  theme: {
    extend: {
      colors: {
        'obsidian': '#0A1024',
        'charcoal': '#3A456B',
        'blueberry': '#5C7CFA',
        'lavender': '#DDE3FF',
      },
    },
  },
};

{
  "name": "Nocturne Blue",
  "colors": [
    "#0A1024",
    "#3A456B",
    "#5C7CFA",
    "#DDE3FF"
  ]
}

background: linear-gradient(135deg, #0A1024, #3A456B, #5C7CFA, #DDE3FF);

Or ask about it in ChatGPT Claude Perplexity

Edit this palette in the generator →

Added 2026-02-24 · Free for commercial use, no attribution needed.

Similar palettes 24 more in this mood