#183F7B

#183F7B

Color Values

HEX

#183F7B

RGB

24, 63, 123

HSL

216.4, 67.3%, 28.8%

HSV

216.4, 80.5%, 48.2%

CMYK

80.5%, 48.8%, 0.0%, 51.8%

OKLCH

0.3757 0.1113 259.0

Properties

Cool Dark Nearest: RAL 5017 Traffic Blue

Color Harmonies

Complementary

#183F7B

#7B5418

Analogous

#18707B

#23187B

#183F7B

Triadic

#183F7B

#7B183F

#3F7B18

Split Complementary

#183F7B

#7B2318

#707B18

Tetradic

#183F7B

#7B1870

#7B5418

#187B23

Color Blindness Simulation

Original

#183F7B

Protanopia

#29296C

Deuteranopia

#272469

Tritanopia

#1A615E

Achromatopsia

#3B3B3B

CSS Usage

background-color: #183F7B;
color: #183F7B;
border-color: #183F7B;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F3F6FC
100
#E3EBF7
200
#C3D6F3
300
#99B9EB
400
#6193E0
500
#2A6DD5
600
#2157AB
700
#1B4689
800
#15376B
900
#132A4E
950
#0C1B31

Contrast Checker

Text on white

10.32:1

AA Pass AAA Pass

Text on black

2.04:1

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