#403DA8#403DA8

#403DA8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.1% C 0.166 H 278.0°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#403DA8
RGB	rgb(64, 61, 168)
HSL	hsl(242, 47%, 45%)
HSV	hsv(242, 64%, 66%)
CMYK	cmyk(61.9%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(32.38, 34.01, -57.24)
CIE-LCH	lch(32.38, 66.58, 300.72°)
OKLab	oklab(43.11% 0.0233 -0.1648)
OKLCH	oklch(43.11% 0.166 278)
XYZ	xyz(10.8487, 7.2538, 37.8666)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.21

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403DA8 #A5A83D

analogous

#3D70A8 #403DA8 #753DA8

triadic

#403DA8 #A8403D #3DA840

tetradic

#403DA8 #A83D70 #A5A83D #3DA875

square

#403DA8 #A83D70 #A5A83D #3DA875

split-complementary

#403DA8 #A8753D #70A83D

monochromatic

#1E1C4E #2F2D7B #403DA8 #615EC4 #8D8BD5

Accessibility & contrast

On white

8.57

#403DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#403DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403DA8

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403DA8	#FFFFFF	#000000	##FFFFFF
##403DA8	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AB

Deuteranopia (green-blind)

#0048A6

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #403da8;
/* rgb */ color: rgb(64, 61, 168);
/* oklch */ color: oklch(43.1% 0.166 278.0);

Tailwind

colors: {
  custom: {
    50: '#8073c3',
    500: '#403da8',
    950: '#000000',
  },
}

SCSS

$custom: #403da8;
$custom-light: #8073c3;
$custom-dark: #000000;

JSON

{
  "hex": "#403da8",
  "rgb": {
    "r": 64,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 241.682,
    "s": 46.725,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43107,
    "c": 0.16642,
    "h": 278
  },
  "luminance": 0.07255
}

Semantic roles & 50–950 ramp

primary

#403DA8

secondary

#BEBF81

accent

#D651D3

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #403DA8

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

Preview Lab → · Contrast checker → · Palette generator →