#303C58

#303C58

Color Values

HEX

#303C58

RGB

48, 60, 88

HSL

222.0, 29.4%, 26.7%

HSV

222.0, 45.5%, 34.5%

CMYK

45.5%, 31.8%, 0.0%, 65.5%

OKLCH

0.3585 0.0514 266.1

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#303C58

#584C30

Analogous

#305058

#383058

#303C58

Triadic

#303C58

#58303C

#3C5830

Split Complementary

#303C58

#583830

#505830

Tetradic

#303C58

#583050

#584C30

#305838

Color Blindness Simulation

Original

#303C58

Protanopia

#353551

Deuteranopia

#343450

Tritanopia

#314C4B

Achromatopsia

#3B3B3B

CSS Usage

background-color: #303C58;
color: #303C58;
border-color: #303C58;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7F9
100
#E9EBF2
200
#D1D7E6
300
#B0BBD4
400
#8596BC
500
#5A71A5
600
#485A84
700
#3A486A
800
#2D3852
900
#242B3D
950
#171B27

Contrast Checker

Text on white

10.98:1

AA Pass AAA Pass

Text on black

1.91:1

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