#403FBB#403FBB

#403FBB is a mid, vivid blue. Relative luminance 0.082; OKLCH L 45.1% C 0.189 H 276.1°. Best body text is #FFFFFF at 7.93:1 contrast (WCAG AA passes).

Color values

HEX	#403FBB
RGB	rgb(64, 63, 187)
HSL	hsl(240, 50%, 49%)
HSV	hsv(240, 66%, 73%)
CMYK	cmyk(65.8%, 66.3%, 0%, 26.7%)
CIE-LAB	lab(34.46, 39.17, -65.12)
CIE-LCH	lch(34.46, 76.00, 301.03°)
OKLab	oklab(45.13% 0.02 -0.1879)
OKLCH	oklch(45.13% 0.189 276.1)
XYZ	xyz(12.8586, 8.2318, 47.9153)
Luminance	0.0823 (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

#403FBB #BABB3F

analogous

#3F7CBB #403FBB #7E3FBB

triadic

#403FBB #BB403F #3FBB40

tetradic

#403FBB #BB3F7C #BABB3F #3FBB7E

square

#403FBB #BB3F7C #BABB3F #3FBB7E

split-complementary

#403FBB #BB7E3F #7CBB3F

monochromatic

#21205F #30308D #403FBB #6B6ACD #9998DC

Accessibility & contrast

On white

7.93

#403FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#403FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FBB

7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FBB	#FFFFFF	#000000	##FFFFFF
##403FBB	1.00	7.93	2.65	7.93
#FFFFFF	7.93	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004CB9

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #403fbb;
/* rgb */ color: rgb(64, 63, 187);
/* oklch */ color: oklch(45.1% 0.189 276.1);

Tailwind

colors: {
  custom: {
    50: '#8475d0',
    500: '#403fbb',
    950: '#000000',
  },
}

SCSS

$custom: #403fbb;
$custom-light: #8475d0;
$custom-dark: #000000;

JSON

{
  "hex": "#403fbb",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 187
  },
  "hsl": {
    "h": 240.484,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.45126,
    "c": 0.18896,
    "h": 276.1
  },
  "luminance": 0.08233
}

Semantic roles & 50–950 ramp

primary

#403FBB

secondary

#C8C88E

accent

#D94FD8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #403FBB

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

Preview Lab → · Contrast checker → · Palette generator →