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#333399 · #333366 · #666699 · #000033 · #000000

dark

A 5-color dark palette · Complete color analysis and application guide

Scene Recommendations Scene Recommendations

Emotion EMOTION

HarmoniousVersatileWarmCool

Industry INDUSTRY

E-commerceBusiness

UI Context UI CONTEXT

Web PageComponent LibraryData Visualization

Color Details Color Details

#333399

Deep Indigo · DarkSlateBlue · Prussian Blue

HEX
#333399
RGB
rgb(51, 51, 153)
HSL
hsl(240, 50%, 40%)
HSB
hsb(240, 67%, 60%)
CMYK
cmyk(67%, 67%, 0%, 40%)
Oklch
oklch(39.1% 0.162 275.9)

Traditional「Deep Indigo」· Paint「Prussian Blue」· Creative Blush Sunrise

#333366

Deep Indigo · DarkSlateGray · Prussian Blue

HEX
#333366
RGB
rgb(51, 51, 102)
HSL
hsl(240, 33%, 30%)
HSB
hsb(240, 50%, 40%)
CMYK
cmyk(50%, 50%, 0%, 60%)
Oklch
oklch(34.9% 0.087 280.9)

Traditional「Deep Indigo」· Paint「Prussian Blue」· Creative Blush Sunrise

#666699

Deep Indigo · SlateGray · Navy Blue

HEX
#666699
RGB
rgb(102, 102, 153)
HSL
hsl(240, 20%, 50%)
HSB
hsb(240, 33%, 60%)
CMYK
cmyk(33%, 33%, 0%, 40%)
Oklch
oklch(53.2% 0.079 283.4)

Traditional「Deep Indigo」· Paint「Navy Blue」· Creative Blush Sunrise

#000033

Deep Indigo · Black · Deep Sea Blue

HEX
#000033
RGB
rgb(0, 0, 51)
HSL
hsl(240, 100%, 10%)
HSB
hsb(240, 100%, 20%)
CMYK
cmyk(100%, 100%, 0%, 80%)
Oklch
oklch(14.5% 0.101 264.1)

Traditional「Deep Indigo」· Paint「Deep Sea Blue」· Creative Blush Sunrise

#000000

Ink Black · Black · Jet Black

HEX
#000000
RGB
rgb(0, 0, 0)
HSL
hsl(0, 0%, 0%)
HSB
hsb(0, 0%, 0%)
CMYK
cmyk(0%, 0%, 0%, 100%)
Oklch
oklch(0.0% 0.000 0.0)

Traditional「Ink Black」· Paint「Jet Black」· Creative Midnight Shadow

Color Harmonies Color Harmonies

Based on color wheel theory, calculated from primary color

Complementary

333399
999933

Analogous

336699
333399
663399

Triadic

333399
993333
339933

Split-Comp.

333399
996633
669933

Tetradic

333399
993366
999933
339966

Contrast Matrix WCAG 2.1 Contrast

333399
333366
666699
000033
000000
—
1.1
Fail
1.9
Fail
2.0
Fail
2.1
Fail
1.1
Fail
—
2.2
Fail
1.7
Fail
1.8
Fail
1.9
Fail
2.2
Fail
—
3.7
AA Large
3.9
AA Large
2.0
Fail
1.7
Fail
3.7
AA Large
—
1.0
Fail
2.1
Fail
1.8
Fail
3.9
AA Large
1.0
Fail
—
White BG
10.1AAA
11.6AAA
5.3AA
20.0AAA
21.0AAA
Black BG
2.1Fail
1.8Fail
3.9AA Large
1.0Fail
1.0Fail

Color Blindness Simulation Color Blindness Simulation

Protanopia

333380
33335A
66668D
000027
000000

Deuteranopia

33337A
333357
66668A
000024
000000

Tritanopia

336D69
33504E
668381
001D1B
000000

Achromatopsia

3F3F3F
393939
6C6C6C
060606
000000

Shades & Tints Shades & Tints

#333399

Dark
Light

#333366

Dark
Light

#666699

Dark
Light

Code Snippets Code Snippets

CSS Custom Properties

:root {
  --color-1: #333399;
  --color-2: #333366;
  --color-3: #666699;
  --color-4: #000033;
  --color-5: #000000;
}

SCSS

$color-1: #333399;
$color-2: #333366;
$color-3: #666699;
$color-4: #000033;
$color-5: #000000;

TAILWIND

colors: {
  'brand-1': '#333399',
  'brand-2': '#333366',
  'brand-3': '#666699',
  'brand-4': '#000033',
  'brand-5': '#000000',
}

RGB Array

[51, 51, 153], [51, 51, 102], [102, 102, 153], [0, 0, 51], [0, 0, 0]

FAQ FAQ

What scenarios is this 5-color palette suitable for?

This dark-style palette of #333399, #333366, #666699, #000033, #000000 is ideal for: tech websites, dark mode UIs, game UIs, infographics, data visualization, accessible design. High contrast ensures clear visual hierarchy and readability. It is a balanced and harmonious choice among 5-color palettes.

How to use this palette in CSS or frontend projects?

Copy the CSS variables directly: --color-1: #333399; --color-2: #333366; --color-3: #666699; --color-4: #000033; --color-5: #000000. LangColor editor supports one-click export to CSS, SCSS, Tailwind, JSON and more. Click the "Export" button to choose your format.

What UI/UX design tips apply to this palette?

Dark tones work well as backgrounds; pair with light text for readability. Use the brightest color for CTA buttons and interactive elements. High-contrast palettes naturally meet WCAG accessibility standards. Use the "Contrast Matrix" tool in LangColor editor to check WCAG accessibility levels for every color pair.

Which industries or brands suit this palette?

This dark-style 5-color scheme is especially suited for tech, SaaS, healthcare, eco industries. Click "AI Analysis" in the editor for more detailed brand color suggestions.

🎨 Open this palette in Editor →

Generated by LangColor online color tool · Breaking the barrier between language and color