#303B4F

#303B4F

Color Values

HEX

#303B4F

RGB

48, 59, 79

HSL

218.7, 24.4%, 24.9%

HSV

218.7, 39.2%, 31.0%

CMYK

39.2%, 25.3%, 0.0%, 69.0%

OKLCH

0.3512 0.0381 262.2

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#303B4F

#4F4430

Analogous

#304A4F

#34304F

#303B4F

Triadic

#303B4F

#4F303B

#3B4F30

Split Complementary

#303B4F

#4F3430

#4A4F30

Tetradic

#303B4F

#4F304A

#4F4430

#304F34

Color Blindness Simulation

Original

#303B4F

Protanopia

#35354A

Deuteranopia

#343349

Tritanopia

#314646

Achromatopsia

#3A3A3A

CSS Usage

background-color: #303B4F;
color: #303B4F;
border-color: #303B4F;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F9
100
#E9ECF1
200
#D3D9E4
300
#B3BDD1
400
#8A9AB8
500
#60769F
600
#4D5F7F
700
#3E4C66
800
#303B4F
900
#262D3B
950
#181D25

Contrast Checker

Text on white

11.27:1

AA Pass AAA Pass

Text on black

1.86:1

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