#043581

#043581

Color Values

HEX

#043581

RGB

4, 53, 129

HSL

216.5, 94.0%, 26.1%

HSV

216.5, 96.9%, 50.6%

CMYK

96.9%, 58.9%, 0.0%, 49.4%

OKLCH

0.3524 0.1375 260.0

Properties

Cool Dark Nearest: NCS S 3060-B Dark Blue

Color Harmonies

Complementary

#043581

#815004

Analogous

#047481

#120481

#043581

Triadic

#043581

#810435

#358104

Split Complementary

#043581

#811204

#748104

Tetradic

#043581

#810474

#815004

#048112

Color Blindness Simulation

Original

#043581

Protanopia

#191A6F

Deuteranopia

#16136A

Tritanopia

#06605D

Achromatopsia

#303030

CSS Usage

background-color: #043581;
color: #043581;
border-color: #043581;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F1F6FD
100
#DFEAFB
200
#BAD4FD
300
#88B5FB
400
#488DF9
500
#0866F7
600
#0651C6
700
#05419E
800
#04337C
900
#072859
950
#051938

Contrast Checker

Text on white

11.47:1

AA Pass AAA Pass

Text on black

1.83:1

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