#151B40

#151B40

Color Values

HEX

#151B40

RGB

21, 27, 64

HSL

231,6, 50,6%, 16,7%

HSV

231,6, 67,2%, 25,1%

CMYK

67,2%, 57,8%, 0,0%, 74,9%

OKLCH

0,2401 0,0702 273,0

Properties

Cool Dark Nearest: RAL 5022 Night Blue

Color Harmonies

Complementary

#151B40

#403A15

Analogous

#153140

#251540

#151B40

Triadic

#151B40

#40151B

#1B4015

Split Complementary

#151B40

#402515

#314015

Tetradic

#151B40

#401531

#403A15

#154025

Color Blindness Simulation

Original

#151B40

Protanopia

#181837

Deuteranopia

#171735

Tritanopia

#15302E

Achromatopsia

#1C1C1C

CSS Usage

background-color: #151B40;
color: #151B40;
border-color: #151B40;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F4F5FB
100
#E5E8F5
200
#C9CEED
300
#A3ACE1
400
#717ED0
500
#3F51C0
600
#32419A
700
#28347B
800
#1F2960
900
#1A2147
950
#11152D

Contrast Checker

Text on white

16,63:1

AA Pass AAA Pass

Text on black

1,26:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Oca 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Oca 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Oca 15, 2026