#042137

#042137

Color Values

HEX

#042137

RGB

4, 33, 55

HSL

205.9, 86.4%, 11.6%

HSV

205.9, 92.7%, 21.6%

CMYK

92.7%, 40.0%, 0.0%, 78.4%

OKLCH

0.2395 0.0544 245.3

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#042137

#371A04

Analogous

#043734

#040837

#042137

Triadic

#042137

#370421

#213704

Split Complementary

#042137

#370408

#373404

Tetradic

#042137

#340437

#371A04

#083704

Color Blindness Simulation

Original

#042137

Protanopia

#111132

Deuteranopia

#0F0D30

Tritanopia

#052D2D

Achromatopsia

#1C1C1C

CSS Usage

background-color: #042137;
color: #042137;
border-color: #042137;
Nearest Tailwind: Slate 800 #1E293B

Tailwind Shades

50
#F2F8FD
100
#E0EFFA
200
#BCE0FA
300
#8DC9F7
400
#4FACF2
500
#118FEE
600
#0E72BE
700
#0B5B98
800
#094777
900
#0B3656
950
#072236

Contrast Checker

Text on white

16.43:1

AA Pass AAA Pass

Text on black

1.28:1

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