#403CB5#403CB5

#403CB5 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.1% C 0.185 H 277.1°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#403CB5
RGB	rgb(64, 60, 181)
HSL	hsl(242, 50%, 47%)
HSV	hsv(242, 67%, 71%)
CMYK	cmyk(64.6%, 66.9%, 0%, 29%)
CIE-LAB	lab(33.26, 38.99, -63.55)
CIE-LCH	lch(33.26, 74.55, 301.53°)
OKLab	oklab(44.09% 0.0229 -0.1833)
OKLCH	oklch(44.09% 0.185 277.1)
XYZ	xyz(12.0680, 7.6569, 44.5491)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.50

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403CB5 #B1B53C

analogous

#3C75B5 #403CB5 #7C3CB5

triadic

#403CB5 #B5403C #3CB540

tetradic

#403CB5 #B53C75 #B1B53C #3CB57C

square

#403CB5 #B53C75 #B1B53C #3CB57C

split-complementary

#403CB5 #B57C3C #75B53C

monochromatic

#1F1E59 #302D87 #403CB5 #6663CB #9391DB

Accessibility & contrast

On white

8.30

#403CB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#403CB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403CB5

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403CB5	#FFFFFF	#000000	##FFFFFF
##403CB5	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0049B3

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #403cb5;
/* rgb */ color: rgb(64, 60, 181);
/* oklch */ color: oklch(44.1% 0.185 277.1);

Tailwind

colors: {
  custom: {
    50: '#8372cc',
    500: '#403cb5',
    950: '#000000',
  },
}

SCSS

$custom: #403cb5;
$custom-light: #8372cc;
$custom-dark: #000000;

JSON

{
  "hex": "#403cb5",
  "rgb": {
    "r": 64,
    "g": 60,
    "b": 181
  },
  "hsl": {
    "h": 241.983,
    "s": 50.207,
    "l": 47.255
  },
  "oklch": {
    "l": 0.44092,
    "c": 0.18472,
    "h": 277.1
  },
  "luminance": 0.07658
}

Semantic roles & 50–950 ramp

primary

#403CB5

secondary

#C3C687

accent

#DA4ED5

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403CB5

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

Preview Lab → · Contrast checker → · Palette generator →