#123666

#123666

Color Values

HEX

#123666

RGB

18, 54, 102

HSL

214.3, 70.0%, 23.5%

HSV

214.3, 82.4%, 40.0%

CMYK

82.4%, 47.1%, 0.0%, 60.0%

OKLCH

0.3358 0.0938 256.9

Properties

Cool Dark Nearest: RAL 5017 Traffic Blue

Color Harmonies

Complementary

#123666

#664212

Analogous

#126066

#181266

#123666

Triadic

#123666

#661236

#366612

Split Complementary

#123666

#661812

#606612

Tetradic

#123666

#661260

#664212

#126618

Color Blindness Simulation

Original

#123666

Protanopia

#22225A

Deuteranopia

#201D58

Tritanopia

#14514F

Achromatopsia

#323232

CSS Usage

background-color: #123666;
color: #123666;
border-color: #123666;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F3F7FC
100
#E3ECF8
200
#C2D8F4
300
#97BCED
400
#5F97E3
500
#2673D9
600
#1F5CAD
700
#18498B
800
#13396C
900
#122C4F
950
#0B1C32

Contrast Checker

Text on white

12.03:1

AA Pass AAA Pass

Text on black

1.75:1

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