#15151B

#15151B

Color Values

HEX

#15151B

RGB

21, 21, 27

HSL

240.0, 12.5%, 9.4%

HSV

240.0, 22.2%, 10.6%

CMYK

22.2%, 22.2%, 0.0%, 89.4%

OKLCH

0.1985 0.0119 285.3

Properties

Cool Dark Nearest: RAL 5004 Black Blue

Color Harmonies

Complementary

#15151B

#1B1B15

Analogous

#15181B

#18151B

#15151B

Triadic

#15151B

#1B1515

#151B15

Split Complementary

#15151B

#1B1815

#181B15

Tetradic

#15151B

#1B1518

#1B1B15

#151B18

Color Blindness Simulation

Original

#15151B

Protanopia

#15151A

Deuteranopia

#151519

Tritanopia

#151818

Achromatopsia

#151515

CSS Usage

background-color: #15151B;
color: #15151B;
border-color: #15151B;
Nearest Tailwind: Zinc 900 #18181B

Tailwind Shades

50
#F7F7F8
100
#EBEBEF
200
#D7D7E0
300
#BABAC9
400
#9595AC
500
#70708F
600
#595973
700
#47475C
800
#383848
900
#2B2B36
950
#1B1B22

Contrast Checker

Text on white

18.18:1

AA Pass AAA Pass

Text on black

1.15:1

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