#151B34

#151B34

Color Values

HEX

#151B34

RGB

21, 27, 52

HSL

228,4, 42,5%, 14,3%

HSV

228,4, 59,6%, 20,4%

CMYK

59,6%, 48,1%, 0,0%, 79,6%

OKLCH

0,2306 0,0492 271,9

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#151B34

#342E15

Analogous

#152A34

#1E1534

#151B34

Triadic

#151B34

#34151B

#1B3415

Split Complementary

#151B34

#341E15

#2A3415

Tetradic

#151B34

#34152A

#342E15

#15341E

Color Blindness Simulation

Original

#151B34

Protanopia

#18182E

Deuteranopia

#17172C

Tritanopia

#152928

Achromatopsia

#1C1C1C

CSS Usage

background-color: #151B34;
color: #151B34;
border-color: #151B34;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F6FA
100
#E7E9F4
200
#CCD2EA
300
#A8B2DC
400
#7988C9
500
#495EB6
600
#3B4B91
700
#2F3C74
800
#252F5B
900
#1E2543
950
#13172A

Contrast Checker

Text on white

16,96:1

AA Pass AAA Pass

Text on black

1,24:1

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