#171D55

#171D55

Color Values

HEX

#171D55

RGB

23, 29, 85

HSL

234.2, 57.4%, 21.2%

HSV

234.2, 72.9%, 33.3%

CMYK

72.9%, 65.9%, 0.0%, 66.7%

OKLCH

0.2652 0.1006 272.8

Properties

Cool Dark Nearest: RAL 5005 Signal Blue

Color Harmonies

Complementary

#171D55

#554F17

Analogous

#173C55

#301755

#171D55

Triadic

#171D55

#55171D

#1D5517

Split Complementary

#171D55

#553017

#3C5517

Tetradic

#171D55

#55173C

#554F17

#175530

Color Blindness Simulation

Original

#171D55

Protanopia

#1A1A47

Deuteranopia

#191944

Tritanopia

#173D3A

Achromatopsia

#202020

CSS Usage

background-color: #171D55;
color: #171D55;
border-color: #171D55;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F4F4FB
100
#E4E6F6
200
#C7CBF0
300
#9FA5E5
400
#6A75D7
500
#3644C9
600
#2B37A1
700
#232C80
800
#1B2264
900
#171C49
950
#0F122E

Contrast Checker

Text on white

15.63:1

AA Pass AAA Pass

Text on black

1.34:1

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