#040F43

#040F43

Color Values

HEX

#040F43

RGB

4, 15, 67

HSL

229.5, 88.7%, 13.9%

HSV

229.5, 94.0%, 26.3%

CMYK

94.0%, 77.6%, 0.0%, 73.7%

OKLCH

0.2051 0.0985 266.1

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#040F43

#433804

Analogous

#042E43

#180443

#040F43

Triadic

#040F43

#43040F

#0F4304

Split Complementary

#040F43

#431804

#2E4304

Tetradic

#040F43

#43042E

#433804

#044318

Color Blindness Simulation

Original

#040F43

Protanopia

#090936

Deuteranopia

#080733

Tritanopia

#052C2A

Achromatopsia

#101010

CSS Usage

background-color: #040F43;
color: #040F43;
border-color: #040F43;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F2F4FD
100
#E0E4FB
200
#BCC7FB
300
#8C9FF8
400
#4D6AF4
500
#0E36F1
600
#0C2BC0
700
#09239A
800
#071B78
900
#0A1757
950
#060F37

Contrast Checker

Text on white

18.19:1

AA Pass AAA Pass

Text on black

1.15:1

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