#00398D

#00398D

Color Values

HEX

#00398D

RGB

0, 57, 141

HSL

215.7, 100.0%, 27.6%

HSV

215.7, 100.0%, 55.3%

CMYK

100.0%, 59.6%, 0.0%, 44.7%

OKLCH

0.3714 0.1496 259.8

Properties

Cool Dark Nearest: royalblue 4

Color Harmonies

Complementary

#00398D

#8D5400

Analogous

#007F8D

#0D008D

#00398D

Triadic

#00398D

#8D0039

#398D00

Split Complementary

#00398D

#8D0D00

#7F8D00

Tetradic

#00398D

#8D007F

#8D5400

#008D0D

Color Blindness Simulation

Original

#00398D

Protanopia

#191979

Deuteranopia

#151174

Tritanopia

#036965

Achromatopsia

#333333

CSS Usage

background-color: #00398D;
color: #00398D;
border-color: #00398D;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F1F6FE
100
#DEEAFC
200
#B8D5FF
300
#85B6FF
400
#428FFF
500
#0067FF
600
#0053CC
700
#0042A3
800
#003480
900
#05285C
950
#03193A

Contrast Checker

Text on white

10.66:1

AA Pass AAA Pass

Text on black

1.97:1

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