#403FA6#403FA6

#403FA6 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.161 H 277.7°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#403FA6
RGB	rgb(64, 63, 166)
HSL	hsl(241, 45%, 45%)
HSV	hsv(241, 62%, 65%)
CMYK	cmyk(61.4%, 62%, 0%, 34.9%)
CIE-LAB	lab(32.70, 32.08, -55.52)
CIE-LCH	lch(32.70, 64.12, 300.02°)
OKLab	oklab(43.29% 0.0216 -0.1597)
OKLCH	oklch(43.29% 0.161 277.7)
XYZ	xyz(10.7726, 7.3974, 36.9292)
Luminance	0.0740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.61

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA6 #A5A63F

analogous

#3F71A6 #403FA6 #743FA6

triadic

#403FA6 #A6403F #3FA640

tetradic

#403FA6 #A63F71 #A5A63F #3FA674

square

#403FA6 #A63F71 #A5A63F #3FA674

split-complementary

#403FA6 #A6743F #71A63F

monochromatic

#1E1D4D #2F2E7A #403FA6 #6160C3 #8D8CD3

Accessibility & contrast

On white

8.47

#403FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#403FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA6

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA6	#FFFFFF	#000000	##FFFFFF
##403FA6	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A9

Deuteranopia (green-blind)

#0049A4

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403fa6;
/* rgb */ color: rgb(64, 63, 166);
/* oklch */ color: oklch(43.3% 0.161 277.7);

Tailwind

colors: {
  custom: {
    50: '#8074c1',
    500: '#403fa6',
    950: '#000000',
  },
}

SCSS

$custom: #403fa6;
$custom-light: #8074c1;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa6",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 240.583,
    "s": 44.978,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43289,
    "c": 0.16118,
    "h": 277.7
  },
  "luminance": 0.07398
}

Semantic roles & 50–950 ramp

primary

#403FA6

secondary

#BEBE83

accent

#D553D3

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #403FA6

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →