#283B7F

#283B7F

Color Values

HEX

#283B7F

RGB

40, 59, 127

HSL

226.9, 52.1%, 32.7%

HSV

226.9, 68.5%, 49.8%

CMYK

68.5%, 53.5%, 0.0%, 50.2%

OKLCH

0.3772 0.1173 268.5

Properties

Cool Dark Nearest: NCS S 3060-B Dark Blue

Color Harmonies

Complementary

#283B7F

#7F6C28

Analogous

#28667F

#40287F

#283B7F

Triadic

#283B7F

#7F283B

#3B7F28

Split Complementary

#283B7F

#7F4028

#667F28

Tetradic

#283B7F

#7F2866

#7F6C28

#287F40

Color Blindness Simulation

Original

#283B7F

Protanopia

#30306F

Deuteranopia

#2F2E6B

Tritanopia

#29625F

Achromatopsia

#3C3C3C

CSS Usage

background-color: #283B7F;
color: #283B7F;
border-color: #283B7F;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F4F5FB
100
#E5E9F5
200
#C9D1EE
300
#A2B0E2
400
#6F85D2
500
#3D5AC2
600
#31489B
700
#273A7C
800
#1F2D61
900
#1A2447
950
#10172D

Contrast Checker

Text on white

10.38:1

AA Pass AAA Pass

Text on black

2.02:1

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