#12243F

#12243F

Color Values

HEX

#12243F

RGB

18, 36, 63

HSL

216.0, 55.6%, 15.9%

HSV

216.0, 71.4%, 24.7%

CMYK

71.4%, 42.9%, 0.0%, 75.3%

OKLCH

0.2604 0.0564 258.3

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#12243F

#3F2D12

Analogous

#123B3F

#17123F

#12243F

Triadic

#12243F

#3F1224

#243F12

Split Complementary

#12243F

#3F1712

#3B3F12

Tetradic

#12243F

#3F123B

#3F2D12

#123F17

Color Blindness Simulation

Original

#12243F

Protanopia

#1A1A38

Deuteranopia

#191737

Tritanopia

#133332

Achromatopsia

#222222

CSS Usage

background-color: #12243F;
color: #12243F;
border-color: #12243F;
Nearest Tailwind: Sky 950 #082F49

Tailwind Shades

50
#F4F7FB
100
#E5EBF6
200
#C7D7EF
300
#A0BBE4
400
#6C96D5
500
#3971C6
600
#2D5B9F
700
#24497F
800
#1C3963
900
#182C49
950
#0F1C2E

Contrast Checker

Text on white

15.56:1

AA Pass AAA Pass

Text on black

1.35:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026