#12377F

#12377F

Color Values

HEX

#12377F

RGB

18, 55, 127

HSL

219.6, 75.2%, 28.4%

HSV

219.6, 85.8%, 49.8%

CMYK

85.8%, 56.7%, 0.0%, 50.2%

OKLCH

0.3585 0.1292 261.9

Properties

Cool Dark Nearest: NCS S 3060-B Dark Blue

Color Harmonies

Complementary

#12377F

#7F5A12

Analogous

#126D7F

#23127F

#12377F

Triadic

#12377F

#7F1237

#377F12

Split Complementary

#12377F

#7F2312

#6D7F12

Tetradic

#12377F

#7F126D

#7F5A12

#127F23

Color Blindness Simulation

Original

#12377F

Protanopia

#22226E

Deuteranopia

#201D69

Tritanopia

#14605D

Achromatopsia

#343434

CSS Usage

background-color: #12377F;
color: #12377F;
border-color: #12377F;
Nearest Tailwind: Blue 900 #1E3A8A

Tailwind Shades

50
#F2F6FC
100
#E2E9F9
200
#C0D3F6
300
#94B3F0
400
#5A8AE8
500
#2061DF
600
#194DB3
700
#143E8F
800
#103070
900
#102651
950
#0A1833

Contrast Checker

Text on white

11.18:1

AA Pass AAA Pass

Text on black

1.88:1

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