#283B5B

#283B5B

Color Values

HEX

#283B5B

RGB

40, 59, 91

HSL

217.6, 38.9%, 25.7%

HSV

217.6, 56.0%, 35.7%

CMYK

56.0%, 35.2%, 0.0%, 64.3%

OKLCH

0.3521 0.0613 260.4

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#283B5B

#5B4828

Analogous

#28555B

#2F285B

#283B5B

Triadic

#283B5B

#5B283B

#3B5B28

Split Complementary

#283B5B

#5B2F28

#555B28

Tetradic

#283B5B

#5B2855

#5B4828

#285B2F

Color Blindness Simulation

Original

#283B5B

Protanopia

#303053

Deuteranopia

#2F2E51

Tritanopia

#294D4C

Achromatopsia

#393939

CSS Usage

background-color: #283B5B;
color: #283B5B;
border-color: #283B5B;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7FA
100
#E7ECF3
200
#CDD8E9
300
#AABCDA
400
#7C97C5
500
#4E73B1
600
#3E5C8E
700
#324A71
800
#273959
900
#1F2C41
950
#141C29

Contrast Checker

Text on white

11.25:1

AA Pass AAA Pass

Text on black

1.87:1

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