#181C99

#181C99

Color Values

HEX

#181C99

RGB

24, 28, 153

HSL

238.1, 72.9%, 34.7%

HSV

238.1, 84.3%, 60.0%

CMYK

84.3%, 81.7%, 0.0%, 40.0%

OKLCH

0.3405 0.1925 269.0

Properties

Cool Dark Nearest: navy

Color Harmonies

Complementary

#181C99

#999518

Analogous

#185D99

#541899

#181C99

Triadic

#181C99

#99181C

#1C9918

Split Complementary

#181C99

#995418

#5D9918

Tetradic

#181C99

#99185D

#999518

#189954

Color Blindness Simulation

Original

#181C99

Protanopia

#1A1A7B

Deuteranopia

#1A1974

Tritanopia

#18635E

Achromatopsia

#242424

CSS Usage

background-color: #181C99;
color: #181C99;
border-color: #181C99;
Nearest Tailwind: Indigo 800 #3730A3

Tailwind Shades

50
#F3F3FC
100
#E2E3F8
200
#C1C3F5
300
#9598EE
400
#5C60E5
500
#2328DC
600
#1C20B0
700
#161A8D
800
#11146E
900
#111350
950
#0B0C33

Contrast Checker

Text on white

12.61:1

AA Pass AAA Pass

Text on black

1.66:1

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