#403DBB#403DBB

#403DBB is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.8% C 0.191 H 276.4°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#403DBB
RGB	rgb(64, 61, 187)
HSL	hsl(241, 51%, 49%)
HSV	hsv(241, 67%, 73%)
CMYK	cmyk(65.8%, 67.4%, 0%, 26.7%)
CIE-LAB	lab(34.01, 40.38, -65.86)
CIE-LCH	lch(34.01, 77.25, 301.51°)
OKLab	oklab(44.8% 0.0214 -0.1901)
OKLCH	oklch(44.8% 0.191 276.4)
XYZ	xyz(12.7498, 8.0142, 47.8791)
Luminance	0.0801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.46

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403DBB #B8BB3D

analogous

#3D79BB #403DBB #7F3DBB

triadic

#403DBB #BB403D #3DBB40

tetradic

#403DBB #BB3D79 #B8BB3D #3DBB7F

square

#403DBB #BB3D79 #B8BB3D #3DBB7F

split-complementary

#403DBB #BB7F3D #79BB3D

monochromatic

#201F5F #302E8D #403DBB #6A68CE #9796DD

Accessibility & contrast

On white

8.07

#403DBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#403DBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403DBB

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403DBB	#FFFFFF	#000000	##FFFFFF
##403DBB	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BF

Deuteranopia (green-blind)

#004AB9

Tritanopia (blue-blind)

#005E77

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #403dbb;
/* rgb */ color: rgb(64, 61, 187);
/* oklch */ color: oklch(44.8% 0.191 276.4);

Tailwind

colors: {
  custom: {
    50: '#8473d1',
    500: '#403dbb',
    950: '#000000',
  },
}

SCSS

$custom: #403dbb;
$custom-light: #8473d1;
$custom-dark: #000000;

JSON

{
  "hex": "#403dbb",
  "rgb": {
    "r": 64,
    "g": 61,
    "b": 187
  },
  "hsl": {
    "h": 241.429,
    "s": 50.806,
    "l": 48.627
  },
  "oklch": {
    "l": 0.44801,
    "c": 0.19127,
    "h": 276.4
  },
  "luminance": 0.08015
}

Semantic roles & 50–950 ramp

primary

#403DBB

secondary

#C7C88C

accent

#DA4ED7

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #403DBB

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

Preview Lab → · Contrast checker → · Palette generator →