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#178FB1 · #66D1C7 · #B5812D · #5B3E1C · #271E31

cool

A 5-color cool 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

#178FB1

Lake Blue · LightSeaGreen · Mint Ice

HEX
#178FB1
RGB
rgb(23, 143, 177)
HSL
hsl(193, 77%, 39%)
HSB
hsb(193, 87%, 69%)
CMYK
cmyk(87%, 19%, 0%, 31%)
Oklch
oklch(60.5% 0.108 223.5)

Traditional「Lake Blue」· Paint「Mint Ice」· Creative Blush Sunrise

#66D1C7

Jade · MediumAquaMarine · Lake Green

HEX
#66D1C7
RGB
rgb(102, 209, 199)
HSL
hsl(174, 54%, 61%)
HSB
hsb(174, 51%, 82%)
CMYK
cmyk(51%, 0%, 5%, 18%)
Oklch
oklch(79.5% 0.100 187.3)

Traditional「Jade」· Paint「Lake Green」· Creative Arctic Pool

#B5812D

Ochre · DarkGoldenRod · Amber Brown

HEX
#B5812D
RGB
rgb(181, 129, 45)
HSL
hsl(37, 60%, 44%)
HSB
hsb(37, 75%, 71%)
CMYK
cmyk(0%, 29%, 75%, 29%)
Oklch
oklch(64.0% 0.117 75.3)

Traditional「Ochre」· Paint「Amber Brown」· Creative Blush Sunrise

#5B3E1C

Ochre · DarkOliveGreen · Cinnamon

HEX
#5B3E1C
RGB
rgb(91, 62, 28)
HSL
hsl(32, 53%, 23%)
HSB
hsb(32, 69%, 36%)
CMYK
cmyk(0%, 32%, 69%, 64%)
Oklch
oklch(38.9% 0.063 68.3)

Traditional「Ochre」· Paint「Cinnamon」· Creative Blush Sunrise

#271E31

Deep Indigo · DarkSlateGray · Dark Purple

HEX
#271E31
RGB
rgb(39, 30, 49)
HSL
hsl(268, 24%, 15%)
HSB
hsb(268, 39%, 19%)
CMYK
cmyk(20%, 39%, 0%, 81%)
Oklch
oklch(25.5% 0.037 305.6)

Traditional「Deep Indigo」· Paint「Dark Purple」· Creative Blush Sunrise

Color Harmonies Color Harmonies

Based on color wheel theory, calculated from primary color

Complementary

178FB1
B03817

Analogous

17B085
178FB1
1742B0

Triadic

178FB1
B0178F
8FB017

Split-Comp.

178FB1
B01742
B08517

Tetradic

178FB1
8517B0
B03817
42B017

Contrast Matrix WCAG 2.1 Contrast

178FB1
66D1C7
B5812D
5B3E1C
271E31
—
2.1
Fail
1.1
Fail
2.6
Fail
4.3
AA Large
2.1
Fail
—
1.9
Fail
5.4
AA
8.7
AAA
1.1
Fail
1.9
Fail
—
2.9
Fail
4.7
AA
2.6
Fail
5.4
AA
2.9
Fail
—
1.6
Fail
4.3
AA Large
8.7
AAA
4.7
AA
1.6
Fail
—
White BG
3.7AA Large
1.8Fail
3.4AA Large
9.8AAA
16.0AAA
Black BG
5.6AA
11.5AAA
6.1AA
2.2Fail
1.3Fail

Color Blindness Simulation Color Blindness Simulation

Protanopia

4B4CA9
9495C9
9E9E41
4E4E24
23232C

Deuteranopia

443BA7
8E86CA
A2A546
505226
24242B

Tritanopia

1DA2A1
6BCBCC
B25155
5A2B2C
272928

Achromatopsia

6F6F6F
B0B0B0
878787
434343
232323

Shades & Tints Shades & Tints

#178FB1

Dark
Light

#66D1C7

Dark
Light

#B5812D

Dark
Light

Code Snippets Code Snippets

CSS Custom Properties

:root {
  --color-1: #178fb1;
  --color-2: #66d1c7;
  --color-3: #b5812d;
  --color-4: #5b3e1c;
  --color-5: #271e31;
}

SCSS

$color-1: #178fb1;
$color-2: #66d1c7;
$color-3: #b5812d;
$color-4: #5b3e1c;
$color-5: #271e31;

TAILWIND

colors: {
  'brand-1': '#178fb1',
  'brand-2': '#66d1c7',
  'brand-3': '#b5812d',
  'brand-4': '#5b3e1c',
  'brand-5': '#271e31',
}

RGB Array

[23, 143, 177], [102, 209, 199], [181, 129, 45], [91, 62, 28], [39, 30, 49]

FAQ FAQ

What scenarios is this 5-color palette suitable for?

This cool-style palette of #178FB1, #66D1C7, #B5812D, #5B3E1C, #271E31 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: #178fb1; --color-2: #66d1c7; --color-3: #b5812d; --color-4: #5b3e1c; --color-5: #271e31. 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 cool-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