#403DB5#403DB5

#403DB5 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.3% C 0.184 H 276.9°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#403DB5
RGB	rgb(64, 61, 181)
HSL	hsl(242, 50%, 47%)
HSV	hsv(242, 66%, 71%)
CMYK	cmyk(64.6%, 66.3%, 0%, 29%)
CIE-LAB	lab(33.48, 38.38, -63.18)
CIE-LCH	lch(33.48, 73.92, 301.28°)
OKLab	oklab(44.26% 0.0221 -0.1822)
OKLCH	oklch(44.26% 0.184 276.9)
XYZ	xyz(12.1209, 7.7627, 44.5667)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.38

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403DB5 #B2B53D

analogous

#3D76B5 #403DB5 #7C3DB5

triadic

#403DB5 #B5403D #3DB540

tetradic

#403DB5 #B53D76 #B2B53D #3DB57C

square

#403DB5 #B53D76 #B2B53D #3DB57C

split-complementary

#403DB5 #B57C3D #76B53D

monochromatic

#201E59 #302E87 #403DB5 #6764CB #9492DA

Accessibility & contrast

On white

8.23

#403DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#403DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403DB5

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403DB5	#FFFFFF	#000000	##FFFFFF
##403DB5	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#004AB3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #403db5;
/* rgb */ color: rgb(64, 61, 181);
/* oklch */ color: oklch(44.3% 0.184 276.9);

Tailwind

colors: {
  custom: {
    50: '#8373cc',
    500: '#403db5',
    950: '#000000',
  },
}

SCSS

$custom: #403db5;
$custom-light: #8373cc;
$custom-dark: #000000;

JSON

{
  "hex": "#403db5",
  "rgb": {
    "r": 64,
    "g": 61,
    "b": 181
  },
  "hsl": {
    "h": 241.5,
    "s": 49.587,
    "l": 47.451
  },
  "oklch": {
    "l": 0.44255,
    "c": 0.18355,
    "h": 276.9
  },
  "luminance": 0.07764
}

Semantic roles & 50–950 ramp

primary

#403DB5

secondary

#C4C588

accent

#D94FD6

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403DB5

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

Preview Lab → · Contrast checker → · Palette generator →