#283D7B

#283D7B

Color Values

HEX

#283D7B

RGB

40, 61, 123

HSL

224.8, 50.9%, 32.0%

HSV

224.8, 67.5%, 48.2%

CMYK

67.5%, 50.4%, 0.0%, 51.8%

OKLCH

0.3785 0.1085 267.1

Properties

Cool Dark Nearest: RAL 5017 Traffic Blue

Color Harmonies

Complementary

#283D7B

#7B6628

Analogous

#28677B

#3D287B

#283D7B

Triadic

#283D7B

#7B283D

#3D7B28

Split Complementary

#283D7B

#7B3D28

#677B28

Tetradic

#283D7B

#7B2867

#7B6628

#287B3D

Color Blindness Simulation

Original

#283D7B

Protanopia

#31316C

Deuteranopia

#302E68

Tritanopia

#29605E

Achromatopsia

#3D3D3D

CSS Usage

background-color: #283D7B;
color: #283D7B;
border-color: #283D7B;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F4F6FB
100
#E5E9F5
200
#C9D2ED
300
#A3B2E1
400
#7189D1
500
#3F5FC0
600
#324C9A
700
#283D7B
800
#1F3060
900
#1A2647
950
#11182D

Contrast Checker

Text on white

10.28:1

AA Pass AAA Pass

Text on black

2.04:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026