#404666#404666

#404666 is a dark, muted blue. Relative luminance 0.064; OKLCH L 40.3% C 0.055 H 275.5°. Best body text is #FFFFFF at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#404666
RGB	rgb(64, 70, 102)
HSL	hsl(231, 23%, 33%)
HSV	hsv(231, 37%, 40%)
CMYK	cmyk(37.3%, 31.4%, 0%, 60%)
CIE-LAB	lab(30.47, 6.26, -19.50)
CIE-LCH	lch(30.47, 20.48, 287.80°)
OKLab	oklab(40.29% 0.0053 -0.0543)
OKLCH	oklch(40.29% 0.055 275.5)
XYZ	xyz(6.7021, 6.4294, 13.4557)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#404666 #666040

analogous

#405966 #404666 #4D4066

triadic

#404666 #664046 #466640

tetradic

#404666 #664059 #666040 #40664D

square

#404666 #664059 #666040 #40664D

split-complementary

#404666 #664D40 #596640

monochromatic

#11121B #282C40 #404666 #58608C #777FAA

Accessibility & contrast

On white

9.19

#404666 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#404666 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #404666

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##404666	#FFFFFF	#000000	##FFFFFF
##404666	1.00	9.19	2.29	9.19
#FFFFFF	9.19	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C4967

Deuteranopia (green-blind)

#394665

Tritanopia (blue-blind)

#354C51

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #404666;
/* rgb */ color: rgb(64, 70, 102);
/* oklch */ color: oklch(40.3% 0.055 275.5);

Tailwind

colors: {
  custom: {
    50: '#767991',
    500: '#404666',
    950: '#000000',
  },
}

SCSS

$custom: #404666;
$custom-light: #767991;
$custom-dark: #000000;

JSON

{
  "hex": "#404666",
  "rgb": {
    "r": 64,
    "g": 70,
    "b": 102
  },
  "hsl": {
    "h": 230.526,
    "s": 22.892,
    "l": 32.549
  },
  "oklch": {
    "l": 0.40289,
    "c": 0.05451,
    "h": 275.5
  },
  "luminance": 0.0643
}

Semantic roles & 50–950 ramp

primary

#404666

secondary

#958F6D

accent

#B268BF

background

#F7F7F8

surface

#EDEDF0

border

#C8C8CB

text

#08090D

muted

#7B7B7D

Preview Lab

Preview with #404666

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

Preview Lab → · Contrast checker → · Palette generator →