#003F8D

#003F8D

Color Values

HEX

#003F8D

RGB

0, 63, 141

HSL

213.2, 100.0%, 27.6%

HSV

213.2, 100.0%, 55.3%

CMYK

100.0%, 55.3%, 0.0%, 44.7%

OKLCH

0.3847 0.1418 257.9

Properties

Cool Dark Nearest: royalblue 4

Color Harmonies

Complementary

#003F8D

#8D4E00

Analogous

#00858D

#08008D

#003F8D

Triadic

#003F8D

#8D003F

#3F8D00

Split Complementary

#003F8D

#8D0800

#858D00

Tetradic

#003F8D

#8D0085

#8D4E00

#008D08

Color Blindness Simulation

Original

#003F8D

Protanopia

#1B1C7A

Deuteranopia

#181376

Tritanopia

#036B68

Achromatopsia

#373737

CSS Usage

background-color: #003F8D;
color: #003F8D;
border-color: #003F8D;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F1F7FE
100
#DEECFC
200
#B8D7FF
300
#85BBFF
400
#4297FF
500
#0072FF
600
#005BCC
700
#0049A3
800
#003980
900
#052C5C
950
#031C3A

Contrast Checker

Text on white

10.02:1

AA Pass AAA Pass

Text on black

2.1:1

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