#311A40

#311A40

Color Values

HEX

#311A40

RGB

49, 26, 64

HSL

276.3, 42.2%, 17.6%

HSV

276.3, 59.4%, 25.1%

CMYK

23.4%, 59.4%, 0.0%, 74.9%

OKLCH

0.2685 0.0728 310.3

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#311A40

#29401A

Analogous

#1E1A40

#401A3C

#311A40

Triadic

#311A40

#40311A

#1A4031

Split Complementary

#311A40

#3C401A

#1A401E

Tetradic

#311A40

#401E1A

#29401A

#1A3C40

Color Blindness Simulation

Original

#311A40

Protanopia

#272737

Deuteranopia

#282A35

Tritanopia

#30302E

Achromatopsia

#222222

CSS Usage

background-color: #311A40;
color: #311A40;
border-color: #311A40;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F8F5FA
100
#EEE7F4
200
#DECCEA
300
#C7A8DC
400
#A979C8
500
#8B4AB5
600
#6F3B91
700
#592F74
800
#45255B
900
#341E43
950
#21132A

Contrast Checker

Text on white

15.53:1

AA Pass AAA Pass

Text on black

1.35:1

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