#403B66#403B66

#403B66 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.8% C 0.072 H 287.7°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#403B66
RGB	rgb(64, 59, 102)
HSL	hsl(247, 27%, 32%)
HSV	hsv(247, 42%, 40%)
CMYK	cmyk(37.3%, 42.2%, 0%, 60%)
CIE-LAB	lab(27.23, 13.57, -24.56)
CIE-LCH	lch(27.23, 28.06, 298.92°)
OKLab	oklab(37.8% 0.0221 -0.0689)
OKLCH	oklch(37.8% 0.072 287.7)
XYZ	xyz(6.0759, 5.1771, 13.2469)
Luminance	0.0518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403B66 #61663B

analogous

#3B4C66 #403B66 #563B66

triadic

#403B66 #66403B #3B6640

tetradic

#403B66 #663B4C #61663B #3B6656

square

#403B66 #663B4C #61663B #3B6656

split-complementary

#403B66 #66563B #4C663B

monochromatic

#0F0E18 #28253F #403B66 #58518D #766FAC

Accessibility & contrast

On white

10.32

#403B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#403B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403B66

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403B66	#FFFFFF	#000000	##FFFFFF
##403B66	1.00	10.32	2.04	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D4168

Deuteranopia (green-blind)

#2D3F65

Tritanopia (blue-blind)

#36434B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #403b66;
/* rgb */ color: rgb(64, 59, 102);
/* oklch */ color: oklch(37.8% 0.072 287.7);

Tailwind

colors: {
  custom: {
    50: '#767192',
    500: '#403b66',
    950: '#000000',
  },
}

SCSS

$custom: #403b66;
$custom-light: #767192;
$custom-dark: #000000;

JSON

{
  "hex": "#403b66",
  "rgb": {
    "r": 64,
    "g": 59,
    "b": 102
  },
  "hsl": {
    "h": 246.977,
    "s": 26.708,
    "l": 31.569
  },
  "oklch": {
    "l": 0.378,
    "c": 0.07234,
    "h": 287.7
  },
  "luminance": 0.05177
}

Semantic roles & 50–950 ramp

primary

#403B66

secondary

#919667

accent

#C365B8

background

#F7F6F8

surface

#EDECF0

border

#C8C7CB

text

#09070D

muted

#7B7A7D

Preview Lab

Preview with #403B66

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

Preview Lab → · Contrast checker → · Palette generator →