#403FB8#403FB8

#403FB8 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.9% C 0.185 H 276.3°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#403FB8
RGB	rgb(64, 63, 184)
HSL	hsl(240, 49%, 48%)
HSV	hsv(240, 66%, 72%)
CMYK	cmyk(65.2%, 65.8%, 0%, 27.8%)
CIE-LAB	lab(34.20, 38.17, -63.78)
CIE-LCH	lch(34.20, 74.33, 300.90°)
OKLab	oklab(44.86% 0.0203 -0.184)
OKLCH	oklch(44.86% 0.185 276.3)
XYZ	xyz(12.5408, 8.1046, 46.2416)
Luminance	0.0811 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FB8 #B7B83F

analogous

#3F7AB8 #403FB8 #7C3FB8

triadic

#403FB8 #B8403F #3FB840

tetradic

#403FB8 #B83F7A #B7B83F #3FB87C

square

#403FB8 #B83F7A #B7B83F #3FB87C

split-complementary

#403FB8 #B87C3F #7AB83F

monochromatic

#20205D #302F8A #403FB8 #6969CC #9796DB

Accessibility & contrast

On white

8.01

#403FB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#403FB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FB8

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FB8	#FFFFFF	#000000	##FFFFFF
##403FB8	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#004BB6

Tritanopia (blue-blind)

#005E76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #403fb8;
/* rgb */ color: rgb(64, 63, 184);
/* oklch */ color: oklch(44.9% 0.185 276.3);

Tailwind

colors: {
  custom: {
    50: '#8374ce',
    500: '#403fb8',
    950: '#000000',
  },
}

SCSS

$custom: #403fb8;
$custom-light: #8374ce;
$custom-dark: #000000;

JSON

{
  "hex": "#403fb8",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 184
  },
  "hsl": {
    "h": 240.496,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.44856,
    "c": 0.18508,
    "h": 276.3
  },
  "luminance": 0.08106
}

Semantic roles & 50–950 ramp

primary

#403FB8

secondary

#C6C78C

accent

#D94FD7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #403FB8

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

Preview Lab → · Contrast checker → · Palette generator →