#283C63

#283C63

Color Values

HEX

#283C63

RGB

40, 60, 99

HSL

219,7, 42,4%, 27,3%

HSV

219,7, 59,6%, 38,8%

CMYK

59,6%, 39,4%, 0,0%, 61,2%

OKLCH

0,3595 0,0727 262,7

Properties

Cool Dark Nearest: RAL 5000 Violet Blue

Color Harmonies

Complementary

#283C63

#634F28

Analogous

#285A63

#322863

#283C63

Triadic

#283C63

#63283C

#3C6328

Split Complementary

#283C63

#633228

#5A6328

Tetradic

#283C63

#63285A

#634F28

#286332

Color Blindness Simulation

Original

#283C63

Protanopia

#31315A

Deuteranopia

#302E57

Tritanopia

#295250

Achromatopsia

#3B3B3B

CSS Usage

background-color: #283C63;
color: #283C63;
border-color: #283C63;
Nearest Tailwind: Sky 900 #0C4A6E

Tailwind Shades

50
#F5F6FA
100
#E7EBF4
200
#CCD6EA
300
#A8B9DC
400
#7994C9
500
#496EB6
600
#3B5891
700
#2F4674
800
#25375B
900
#1E2A43
950
#131B2A

Contrast Checker

Text on white

10,96:1

AA Pass AAA Pass

Text on black

1,92:1

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