#181641

#181641

Color Values

HEX

#181641

RGB

24, 22, 65

HSL

242.8, 49.4%, 17.1%

HSV

242.8, 66.2%, 25.5%

CMYK

63.1%, 66.2%, 0.0%, 74.5%

OKLCH

0.2321 0.0791 280.4

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#181641

#3F4116

Analogous

#162A41

#2E1641

#181641

Triadic

#181641

#411816

#164118

Split Complementary

#181641

#412E16

#2A4116

Tetradic

#181641

#41162A

#3F4116

#16412E

Color Blindness Simulation

Original

#181641

Protanopia

#171737

Deuteranopia

#171734

Tritanopia

#182E2D

Achromatopsia

#1A1A1A

CSS Usage

background-color: #181641;
color: #181641;
border-color: #181641;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F4FB
100
#E6E6F5
200
#CBCAED
300
#A6A4E0
400
#7672CF
500
#4641BE
600
#383498
700
#2D297A
800
#23205F
900
#1D1B46
950
#12112C

Contrast Checker

Text on white

17.07:1

AA Pass AAA Pass

Text on black

1.23:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026