#403AB5#403AB5

#403AB5 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.8% C 0.187 H 277.5°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#403AB5
RGB	rgb(64, 58, 181)
HSL	hsl(243, 51%, 47%)
HSV	hsv(243, 68%, 71%)
CMYK	cmyk(64.6%, 68%, 0%, 29%)
CIE-LAB	lab(32.81, 40.19, -64.28)
CIE-LCH	lch(32.81, 75.81, 302.02°)
OKLab	oklab(43.77% 0.0244 -0.1854)
OKLCH	oklch(43.77% 0.187 277.5)
XYZ	xyz(11.9652, 7.4513, 44.5148)
Luminance	0.0745 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.81

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403AB5 #AFB53A

analogous

#3A72B5 #403AB5 #7E3AB5

triadic

#403AB5 #B5403A #3AB540

tetradic

#403AB5 #B53A72 #AFB53A #3AB57E

square

#403AB5 #B53A72 #AFB53A #3AB57E

split-complementary

#403AB5 #B57E3A #72B53A

monochromatic

#1F1C58 #302B87 #403AB5 #6560CC #928EDB

Accessibility & contrast

On white

8.43

#403AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#403AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403AB5

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403AB5	#FFFFFF	#000000	##FFFFFF
##403AB5	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403ab5;
/* rgb */ color: rgb(64, 58, 181);
/* oklch */ color: oklch(43.8% 0.187 277.5);

Tailwind

colors: {
  custom: {
    50: '#8371cc',
    500: '#403ab5',
    950: '#000000',
  },
}

SCSS

$custom: #403ab5;
$custom-light: #8371cc;
$custom-dark: #000000;

JSON

{
  "hex": "#403ab5",
  "rgb": {
    "r": 64,
    "g": 58,
    "b": 181
  },
  "hsl": {
    "h": 242.927,
    "s": 51.464,
    "l": 46.863
  },
  "oklch": {
    "l": 0.4377,
    "c": 0.18703,
    "h": 277.5
  },
  "luminance": 0.07452
}

Semantic roles & 50–950 ramp

primary

#403AB5

secondary

#C3C685

accent

#DB4DD4

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403AB5

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

Preview Lab → · Contrast checker → · Palette generator →