#283C4F

#283C4F

Color Values

HEX

#283C4F

RGB

40, 60, 79

HSL

209.2, 32.8%, 23.3%

HSV

209.2, 49.4%, 31.0%

CMYK

49.4%, 24.1%, 0.0%, 69.0%

OKLCH

0.3479 0.0421 247.9

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#283C4F

#4F3B28

Analogous

#284F4E

#28284F

#283C4F

Triadic

#283C4F

#4F283C

#3C4F28

Split Complementary

#283C4F

#4F2828

#4F4E28

Tetradic

#283C4F

#4E284F

#4F3B28

#284F28

Color Blindness Simulation

Original

#283C4F

Protanopia

#31314A

Deuteranopia

#302E49

Tritanopia

#294746

Achromatopsia

#393939

CSS Usage

background-color: #283C4F;
color: #283C4F;
border-color: #283C4F;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F7F9
100
#E8EDF2
200
#D0DCE7
300
#AEC2D6
400
#82A1C0
500
#5681A9
600
#456787
700
#37526C
800
#2B4055
900
#22313F
950
#161F28

Contrast Checker

Text on white

11.35:1

AA Pass AAA Pass

Text on black

1.85:1

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