#403F56#403F56

#403F56 is a dark, muted blue. Relative luminance 0.053; OKLCH L 37.8% C 0.039 H 286.4°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#403F56
RGB	rgb(64, 63, 86)
HSL	hsl(243, 15%, 29%)
HSV	hsv(243, 27%, 34%)
CMYK	cmyk(25.6%, 26.7%, 0%, 66.3%)
CIE-LAB	lab(27.62, 6.21, -13.61)
CIE-LCH	lch(27.62, 14.96, 294.54°)
OKLab	oklab(37.84% 0.011 -0.0374)
OKLCH	oklch(37.84% 0.039 286.4)
XYZ	xyz(5.5712, 5.3168, 9.5350)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403F56 #55563F

analogous

#3F4A56 #403F56 #4C3F56

triadic

#403F56 #56403F #3F5640

tetradic

#403F56 #563F4A #55563F #3F564C

square

#403F56 #563F4A #55563F #3F564C

split-complementary

#403F56 #564C3F #4A563F

monochromatic

#0D0D12 #262533 #403F56 #5A5979 #77759A

Accessibility & contrast

On white

10.18

#403F56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#403F56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403F56

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403F56	#FFFFFF	#000000	##FFFFFF
##403F56	1.00	10.18	2.06	10.18
#FFFFFF	10.18	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394257

Deuteranopia (green-blind)

#394155

Tritanopia (blue-blind)

#3B4347

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #403f56;
/* rgb */ color: rgb(64, 63, 86);
/* oklch */ color: oklch(37.8% 0.039 286.4);

Tailwind

colors: {
  custom: {
    50: '#757485',
    500: '#403f56',
    950: '#000000',
  },
}

SCSS

$custom: #403f56;
$custom-light: #757485;
$custom-dark: #000000;

JSON

{
  "hex": "#403f56",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 86
  },
  "hsl": {
    "h": 242.609,
    "s": 15.436,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37836,
    "c": 0.03901,
    "h": 286.4
  },
  "luminance": 0.05317
}

Semantic roles & 50–950 ramp

primary

#403F56

secondary

#84856B

accent

#B870B5

background

#F7F7F8

surface

#EDEDEF

border

#C8C8CA

text

#08080B

muted

#7B7B7C

Preview Lab

Preview with #403F56

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

Preview Lab → · Contrast checker → · Palette generator →