#171B2F

#171B2F

Color Values

HEX

#171B2F

RGB

23, 27, 47

HSL

230.0, 34.3%, 13.7%

HSV

230.0, 51.1%, 18.4%

CMYK

51.1%, 42.6%, 0.0%, 81.6%

OKLCH

0.2288 0.0393 274.3

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#171B2F

#2F2B17

Analogous

#17272F

#1F172F

#171B2F

Triadic

#171B2F

#2F171B

#1B2F17

Split Complementary

#171B2F

#2F1F17

#272F17

Tetradic

#171B2F

#2F1727

#2F2B17

#172F1F

Color Blindness Simulation

Original

#171B2F

Protanopia

#19192A

Deuteranopia

#181829

Tritanopia

#172626

Achromatopsia

#1C1C1C

CSS Usage

background-color: #171B2F;
color: #171B2F;
border-color: #171B2F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F6FA
100
#E8EAF2
200
#CFD3E8
300
#ADB4D7
400
#808BC1
500
#5462AB
600
#434F89
700
#363F6E
800
#2A3156
900
#21263F
950
#151828

Contrast Checker

Text on white

17.01:1

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