#040C27

#040C27

Color Values

HEX

#040C27

RGB

4, 12, 39

HSL

226.3, 81.4%, 8.4%

HSV

226.3, 89.7%, 15.3%

CMYK

89.7%, 69.2%, 0.0%, 84.7%

OKLCH

0.1662 0.0575 265.6

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040C27

#271F04

Analogous

#041D27

#0D0427

#040C27

Triadic

#040C27

#27040C

#0C2704

Split Complementary

#040C27

#270D04

#1D2704

Tetradic

#040C27

#27041D

#271F04

#04270D

Color Blindness Simulation

Original

#040C27

Protanopia

#070820

Deuteranopia

#07061F

Tritanopia

#041B1A

Achromatopsia

#0C0C0C

CSS Usage

background-color: #040C27;
color: #040C27;
border-color: #040C27;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F4FD
100
#E1E6FA
200
#BECCF8
300
#90A7F4
400
#5477ED
500
#1847E7
600
#1339B9
700
#0F2E94
800
#0C2474
900
#0D1D54
950
#081235

Contrast Checker

Text on white

19.32:1

AA Pass AAA Pass

Text on black

1.09:1

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