#043F9B

#043F9B

Color Values

HEX

#043F9B

RGB

4, 63, 155

HSL

216.6, 95.0%, 31.2%

HSV

216.6, 97.4%, 60.8%

CMYK

97.4%, 59.4%, 0.0%, 39.2%

OKLCH

0.3978 0.1602 260.4

Properties

Cool Dark Nearest: royalblue 4

Color Harmonies

Complementary

#043F9B

#9B6004

Analogous

#048B9B

#15049B

#043F9B

Triadic

#043F9B

#9B043F

#3F9B04

Split Complementary

#043F9B

#9B1504

#8B9B04

Tetradic

#043F9B

#9B048B

#9B6004

#049B15

Color Blindness Simulation

Original

#043F9B

Protanopia

#1E1E85

Deuteranopia

#1A167F

Tritanopia

#07736F

Achromatopsia

#393939

CSS Usage

background-color: #043F9B;
color: #043F9B;
border-color: #043F9B;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F1F6FE
100
#DFEAFC
200
#B9D4FD
300
#88B5FC
400
#478DFA
500
#0665F9
600
#0551C7
700
#04419F
800
#03327C
900
#07275A
950
#041939

Contrast Checker

Text on white

9.59:1

AA Pass AAA Pass

Text on black

2.19:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

1월 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

1월 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

1월 15, 2026