#283F7F

#283F7F

Color Values

HEX

#283F7F

RGB

40, 63, 127

HSL

224,1, 52,1%, 32,7%

HSV

224,1, 68,5%, 49,8%

CMYK

68,5%, 50,4%, 0,0%, 50,2%

OKLCH

0,386 0,1118 266,4

Properties

Cool Dark Nearest: NCS S 3060-B Dark Blue

Color Harmonies

Complementary

#283F7F

#7F6828

Analogous

#286A7F

#3C287F

#283F7F

Triadic

#283F7F

#7F283F

#3F7F28

Split Complementary

#283F7F

#7F3C28

#6A7F28

Tetradic

#283F7F

#7F286A

#7F6828

#287F3C

Color Blindness Simulation

Original

#283F7F

Protanopia

#323270

Deuteranopia

#312F6C

Tritanopia

#296361

Achromatopsia

#3F3F3F

CSS Usage

background-color: #283F7F;
color: #283F7F;
border-color: #283F7F;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F4F6FB
100
#E5E9F5
200
#C9D3EE
300
#A2B3E2
400
#6F8AD2
500
#3D60C2
600
#314D9B
700
#273E7C
800
#1F3061
900
#1A2647
950
#10182D

Contrast Checker

Text on white

9,96:1

AA Pass AAA Pass

Text on black

2,11:1

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