#12243C

#12243C

Color Values

HEX

#12243C

RGB

18, 36, 60

HSL

214.3, 53.8%, 15.3%

HSV

214.3, 70.0%, 23.5%

CMYK

70.0%, 40.0%, 0.0%, 76.5%

OKLCH

0.2583 0.0514 256.1

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#12243C

#3C2A12

Analogous

#12393C

#15123C

#12243C

Triadic

#12243C

#3C1224

#243C12

Split Complementary

#12243C

#3C1512

#393C12

Tetradic

#12243C

#3C1239

#3C2A12

#123C15

Color Blindness Simulation

Original

#12243C

Protanopia

#1A1A36

Deuteranopia

#191735

Tritanopia

#133231

Achromatopsia

#222222

CSS Usage

background-color: #12243C;
color: #12243C;
border-color: #12243C;
Nearest Tailwind: Slate 800 #1E293B

Tailwind Shades

50
#F4F7FB
100
#E5ECF5
200
#C8D9EF
300
#A1BDE3
400
#6E99D3
500
#3B76C4
600
#2F5E9D
700
#264B7E
800
#1D3B62
900
#192D48
950
#101C2D

Contrast Checker

Text on white

15.63:1

AA Pass AAA Pass

Text on black

1.34:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

ม.ค. 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

ม.ค. 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

ม.ค. 15, 2026