#0C1729

#0C1729

Color Values

HEX

#0C1729

RGB

12, 23, 41

HSL

217.2, 54.7%, 10.4%

HSV

217.2, 70.7%, 16.1%

CMYK

70.7%, 43.9%, 0.0%, 83.9%

OKLCH

0.2047 0.0396 259.8

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#0C1729

#291E0C

Analogous

#0C2629

#0F0C29

#0C1729

Triadic

#0C1729

#290C17

#17290C

Split Complementary

#0C1729

#290F0C

#26290C

Tetradic

#0C1729

#290C26

#291E0C

#0C290F

Color Blindness Simulation

Original

#0C1729

Protanopia

#111125

Deuteranopia

#100F24

Tritanopia

#0D2120

Achromatopsia

#161616

CSS Usage

background-color: #0C1729;
color: #0C1729;
border-color: #0C1729;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F4F6FB
100
#E5EBF5
200
#C8D7EF
300
#A0BAE3
400
#6D94D4
500
#3A6FC5
600
#2E599E
700
#25477E
800
#1D3763
900
#192B48
950
#101B2E

Contrast Checker

Text on white

17.95:1

AA Pass AAA Pass

Text on black

1.17:1

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