#171B1F

#171B1F

Color Values

HEX

#171B1F

RGB

23, 27, 31

HSL

210.0, 14.8%, 10.6%

HSV

210.0, 25.8%, 12.2%

CMYK

25.8%, 12.9%, 0.0%, 87.8%

OKLCH

0.2197 0.0099 248.3

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#171B1F

#1F1B17

Analogous

#171F1F

#17171F

#171B1F

Triadic

#171B1F

#1F171B

#1B1F17

Split Complementary

#171B1F

#1F1717

#1F1F17

Tetradic

#171B1F

#1F171F

#1F1B17

#171F17

Color Blindness Simulation

Original

#171B1F

Protanopia

#19191E

Deuteranopia

#18181E

Tritanopia

#171D1D

Achromatopsia

#1A1A1A

CSS Usage

background-color: #171B1F;
color: #171B1F;
border-color: #171B1F;
Nearest Tailwind: Zinc 900 #18181B

Tailwind Shades

50
#F6F7F8
100
#EBEDEF
200
#D6DBE1
300
#B9C2CB
400
#93A1AF
500
#6D8092
600
#576675
700
#46525E
800
#364049
900
#2A3037
950
#1B1F23

Contrast Checker

Text on white

17.31:1

AA Pass AAA Pass

Text on black

1.21:1

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