#040123

#040123

Color Values

HEX

#040123

RGB

4, 1, 35

HSL

245.3, 94.4%, 7.1%

HSV

245.3, 97.1%, 13.7%

CMYK

88.6%, 97.1%, 0.0%, 86.3%

OKLCH

0.1276 0.0733 276.5

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#040123

#202301

Analogous

#010F23

#150123

#040123

Triadic

#040123

#230401

#012304

Split Complementary

#040123

#231501

#0F2301

Tetradic

#040123

#23010F

#202301

#012315

Color Blindness Simulation

Original

#040123

Protanopia

#03031B

Deuteranopia

#030319

Tritanopia

#041413

Achromatopsia

#040404

CSS Usage

background-color: #040123;
color: #040123;
border-color: #040123;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F2F1FD
100
#E1DFFB
200
#C0BAFD
300
#9288FC
400
#5748FA
500
#1C07F8
600
#1706C6
700
#12059F
800
#0E047C
900
#0F075A
950
#090539

Contrast Checker

Text on white

20.31:1

AA Pass AAA Pass

Text on black

1.03:1

AA Fail AAA Fail

Related Articles

Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026
Tutorials

How to Choose Brand Colors: A Step-by-Step Guide

Jan 18, 2026