#283B3A

#283B3A

Color Values

HEX

#283B3A

RGB

40, 59, 58

HSL

176.8, 19.2%, 19.4%

HSV

176.8, 32.2%, 23.1%

CMYK

32.2%, 0.0%, 1.7%, 76.9%

OKLCH

0.3357 0.0244 192.0

Properties

Cool Dark Nearest: RAL 6004 Blue Green

Color Harmonies

Complementary

#283B3A

#3B2829

Analogous

#283B30

#28323B

#283B3A

Triadic

#283B3A

#3A283B

#3B3A28

Split Complementary

#283B3A

#3B2832

#3B3028

Tetradic

#283B3A

#30283B

#3B2829

#323B28

Color Blindness Simulation

Original

#283B3A

Protanopia

#30303A

Deuteranopia

#2F2E3A

Tritanopia

#293A3A

Achromatopsia

#373737

CSS Usage

background-color: #283B3A;
color: #283B3A;
border-color: #283B3A;
Nearest Tailwind: Neutral 700 #404040

Tailwind Shades

50
#F6F9F8
100
#EAF0F0
200
#D4E2E1
300
#B6CECC
400
#8FB3B1
500
#679895
600
#527A77
700
#426160
800
#344C4B
900
#283938
950
#192423

Contrast Checker

Text on white

11.82:1

AA Pass AAA Pass

Text on black

1.78:1

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