#031728

#031728

Color Values

HEX

#031728

RGB

3, 23, 40

HSL

207.6, 86.0%, 8.4%

HSV

207.6, 92.5%, 15.7%

CMYK

92.5%, 42.5%, 0.0%, 84.3%

OKLCH

0.1981 0.0438 245.8

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#031728

#281403

Analogous

#032826

#030428

#031728

Triadic

#031728

#280317

#172803

Split Complementary

#031728

#280304

#282603

Tetradic

#031728

#260328

#281403

#042803

Color Blindness Simulation

Original

#031728

Protanopia

#0C0C24

Deuteranopia

#0A0923

Tritanopia

#042120

Achromatopsia

#141414

CSS Usage

background-color: #031728;
color: #031728;
border-color: #031728;
Nearest Tailwind: Gray 900 #111827

Tailwind Shades

50
#F2F8FD
100
#E0EEFA
200
#BDDEFA
300
#8DC6F6
400
#50A7F2
500
#1288ED
600
#0E6DBE
700
#0B5798
800
#094477
900
#0B3356
950
#072036

Contrast Checker

Text on white

18.15:1

AA Pass AAA Pass

Text on black

1.16:1

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