#403F9A

#403F9A

Color Values

HEX

#403F9A

RGB

64, 63, 154

HSL

240.7, 41.9%, 42.5%

HSV

240.7, 59.1%, 60.4%

CMYK

58.4%, 59.1%, 0.0%, 39.6%

OKLCH

0.423 0.1446 278.7

Properties

Cool Dark Nearest: slateblue 4

Color Harmonies

Complementary

#403F9A

#999A3F

Analogous

#3F6B9A

#6D3F9A

#403F9A

Triadic

#403F9A

#9A403F

#3F9A40

Split Complementary

#403F9A

#9A6D3F

#6B9A3F

Tetradic

#403F9A

#9A3F6B

#999A3F

#3F9A6D

Color Blindness Simulation

Original

#403F9A

Protanopia

#404084

Deuteranopia

#40407F

Tritanopia

#40736F

Achromatopsia

#464646

CSS Usage

background-color: #403F9A;
color: #403F9A;
border-color: #403F9A;
Nearest Tailwind: Indigo 900 #312E81

Tailwind Shades

50
#F5F5FA
100
#E7E7F4
200
#CDCCEA
300
#A9A8DB
400
#7A79C8
500
#4B4AB5
600
#3C3B91
700
#302F74
800
#26255A
900
#1F1E43
950
#13132A

Contrast Checker

Text on white

8.77:1

AA Pass AAA Pass

Text on black

2.4:1

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