#303B55

#303B55

Color Values

HEX

#303B55

RGB

48, 59, 85

HSL

222.2, 27.8%, 26.1%

HSV

222.2, 43.5%, 33.3%

CMYK

43.5%, 30.6%, 0.0%, 66.7%

OKLCH

0.3544 0.0478 266.4

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#303B55

#554A30

Analogous

#304E55

#383055

#303B55

Triadic

#303B55

#55303B

#3B5530

Split Complementary

#303B55

#553830

#4E5530

Tetradic

#303B55

#55304E

#554A30

#305538

Color Blindness Simulation

Original

#303B55

Protanopia

#35354F

Deuteranopia

#34334D

Tritanopia

#314A49

Achromatopsia

#3B3B3B

CSS Usage

background-color: #303B55;
color: #303B55;
border-color: #303B55;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F9
100
#E9EBF1
200
#D1D7E5
300
#B1BBD3
400
#8696BB
500
#5C71A3
600
#4A5A82
700
#3B4868
800
#2E3951
900
#242C3D
950
#171B26

Contrast Checker

Text on white

11.16:1

AA Pass AAA Pass

Text on black

1.88:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026