#18173D

#18173D

Color Values

HEX

#18173D

RGB

24, 23, 61

HSL

241.6, 45.2%, 16.5%

HSV

241.6, 62.3%, 23.9%

CMYK

60.7%, 62.3%, 0.0%, 76.1%

OKLCH

0.2307 0.0708 280.5

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#18173D

#3C3D17

Analogous

#17293D

#2B173D

#18173D

Triadic

#18173D

#3D1817

#173D18

Split Complementary

#18173D

#3D2B17

#293D17

Tetradic

#18173D

#3D1729

#3C3D17

#173D2B

Color Blindness Simulation

Original

#18173D

Protanopia

#181834

Deuteranopia

#181832

Tritanopia

#182D2B

Achromatopsia

#1A1A1A

CSS Usage

background-color: #18173D;
color: #18173D;
border-color: #18173D;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F5F4FA
100
#E7E6F4
200
#CCCBEB
300
#A8A6DD
400
#7876CB
500
#4946B9
600
#3A3894
700
#2F2D76
800
#24235D
900
#1E1D44
950
#13122B

Contrast Checker

Text on white

17.09:1

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