#403DB8#403DB8

#403DB8 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.5% C 0.187 H 276.7°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#403DB8
RGB	rgb(64, 61, 184)
HSL	hsl(241, 50%, 48%)
HSV	hsv(241, 67%, 72%)
CMYK	cmyk(65.2%, 66.8%, 0%, 27.8%)
CIE-LAB	lab(33.75, 39.38, -64.52)
CIE-LCH	lch(33.75, 75.59, 301.40°)
OKLab	oklab(44.53% 0.0218 -0.1861)
OKLCH	oklch(44.53% 0.187 276.7)
XYZ	xyz(12.4320, 7.8871, 46.2053)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.39

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403DB8 #B5B83D

analogous

#3D78B8 #403DB8 #7D3DB8

triadic

#403DB8 #B8403D #3DB840

tetradic

#403DB8 #B83D78 #B5B83D #3DB87D

square

#403DB8 #B83D78 #B5B83D #3DB87D

split-complementary

#403DB8 #B87D3D #78B83D

monochromatic

#201F5C #302E8A #403DB8 #6866CC #9694DB

Accessibility & contrast

On white

8.15

#403DB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#403DB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403DB8

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403DB8	#FFFFFF	#000000	##FFFFFF
##403DB8	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#004AB6

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #403db8;
/* rgb */ color: rgb(64, 61, 184);
/* oklch */ color: oklch(44.5% 0.187 276.7);

Tailwind

colors: {
  custom: {
    50: '#8373ce',
    500: '#403db8',
    950: '#000000',
  },
}

SCSS

$custom: #403db8;
$custom-light: #8373ce;
$custom-dark: #000000;

JSON

{
  "hex": "#403db8",
  "rgb": {
    "r": 64,
    "g": 61,
    "b": 184
  },
  "hsl": {
    "h": 241.463,
    "s": 50.204,
    "l": 48.039
  },
  "oklch": {
    "l": 0.44527,
    "c": 0.18742,
    "h": 276.7
  },
  "luminance": 0.07888
}

Semantic roles & 50–950 ramp

primary

#403DB8

secondary

#C5C78A

accent

#DA4ED6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #403DB8

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

Preview Lab → · Contrast checker → · Palette generator →