#123F7B

#123F7B

Color Values

HEX

#123F7B

RGB

18, 63, 123

HSL

214.3, 74.5%, 27.6%

HSV

214.3, 85.4%, 48.2%

CMYK

85.4%, 48.8%, 0.0%, 51.8%

OKLCH

0.3738 0.113 257.2

Properties

Cool Dark Nearest: RAL 5017 Traffic Blue

Color Harmonies

Complementary

#123F7B

#7B4E12

Analogous

#12737B

#19127B

#123F7B

Triadic

#123F7B

#7B123F

#3F7B12

Split Complementary

#123F7B

#7B1912

#737B12

Tetradic

#123F7B

#7B1273

#7B4E12

#127B19

Color Blindness Simulation

Original

#123F7B

Protanopia

#25266C

Deuteranopia

#232069

Tritanopia

#14615E

Achromatopsia

#3A3A3A

CSS Usage

background-color: #123F7B;
color: #123F7B;
border-color: #123F7B;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F3F7FC
100
#E2ECF8
200
#C1D7F6
300
#94BBEF
400
#5A97E7
500
#2172DE
600
#1A5BB2
700
#15498E
800
#10396F
900
#102C51
950
#0A1C33

Contrast Checker

Text on white

10.38:1

AA Pass AAA Pass

Text on black

2.02:1

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