#001F4D

#001F4D

Color Values

HEX

#001F4D

RGB

0, 31, 77

HSL

215.8, 100.0%, 15.1%

HSV

215.8, 100.0%, 30.2%

CMYK

100.0%, 59.7%, 0.0%, 69.8%

OKLCH

0.2508 0.0929 258.0

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#001F4D

#4D2E00

Analogous

#00464D

#07004D

#001F4D

Triadic

#001F4D

#4D001F

#1F4D00

Split Complementary

#001F4D

#4D0700

#464D00

Tetradic

#001F4D

#4D0046

#4D2E00

#004D07

Color Blindness Simulation

Original

#001F4D

Protanopia

#0D0E42

Deuteranopia

#0C093F

Tritanopia

#023937

Achromatopsia

#1C1C1C

CSS Usage

background-color: #001F4D;
color: #001F4D;
border-color: #001F4D;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F1F6FE
100
#DEEAFC
200
#B8D4FF
300
#85B6FF
400
#428EFF
500
#0067FF
600
#0052CC
700
#0042A3
800
#003380
900
#05285C
950
#03193A

Contrast Checker

Text on white

16.11:1

AA Pass AAA Pass

Text on black

1.3:1

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