#121E41

#121E41

Color Values

HEX

#121E41

RGB

18, 30, 65

HSL

224.7, 56.6%, 16.3%

HSV

224.7, 72.3%, 25.5%

CMYK

72.3%, 53.8%, 0.0%, 74.5%

OKLCH

0.2462 0.0684 267.1

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#121E41

#413512

Analogous

#123641

#1E1241

#121E41

Triadic

#121E41

#41121E

#1E4112

Split Complementary

#121E41

#411E12

#364112

Tetradic

#121E41

#411236

#413512

#12411E

Color Blindness Simulation

Original

#121E41

Protanopia

#171739

Deuteranopia

#161636

Tritanopia

#133230

Achromatopsia

#1E1E1E

CSS Usage

background-color: #121E41;
color: #121E41;
border-color: #121E41;
Nearest Tailwind: Blue 950 #172554

Tailwind Shades

50
#F4F6FB
100
#E5E9F6
200
#C7D1F0
300
#9FB1E4
400
#6B86D6
500
#375CC8
600
#2C4AA0
700
#233B80
800
#1C2E64
900
#182449
950
#0F172E

Contrast Checker

Text on white

16.31:1

AA Pass AAA Pass

Text on black

1.29:1

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