#3F424B#3F424B

#3F424B is a dark, near-neutral blue. Relative luminance 0.055; OKLCH L 38.0% C 0.016 H 271.0°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#3F424B
RGB	rgb(63, 66, 75)
HSL	hsl(225, 9%, 27%)
HSV	hsv(225, 16%, 29%)
CMYK	cmyk(16%, 12%, 0%, 70.6%)
CIE-LAB	lab(28.01, 0.94, -5.86)
CIE-LCH	lch(28.01, 5.93, 279.08°)
OKLab	oklab(37.97% 0.0003 -0.0158)
OKLCH	oklch(37.97% 0.016 271)
XYZ	xyz(5.2678, 5.4611, 7.4318)
Luminance	0.0546 (WCAG relative)
Temperature	neutral
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F424B #4B483F

analogous

#3F484B #3F424B #423F4B

triadic

#3F424B #4B3F42 #424B3F

tetradic

#3F424B #4B3F48 #4B483F #3F4B42

square

#3F424B #4B3F48 #4B483F #3F4B42

split-complementary

#3F424B #4B423F #484B3F

monochromatic

#0E0F11 #23252A #3F424B #5B5F6C #777D8D

Accessibility & contrast

On white

10.04

#3F424B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#3F424B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F424B

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F424B	#FFFFFF	#000000	##FFFFFF
##3F424B	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#40434B

Deuteranopia (green-blind)

#3F424B

Tritanopia (blue-blind)

#3C4445

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3f424b;
/* rgb */ color: rgb(63, 66, 75);
/* oklch */ color: oklch(38.0% 0.016 271.0);

Tailwind

colors: {
  custom: {
    50: '#74767d',
    500: '#3f424b',
    950: '#000000',
  },
}

SCSS

$custom: #3f424b;
$custom-light: #74767d;
$custom-dark: #000000;

JSON

{
  "hex": "#3f424b",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 75
  },
  "hsl": {
    "h": 225,
    "s": 8.696,
    "l": 27.059
  },
  "oklch": {
    "l": 0.37971,
    "c": 0.01583,
    "h": 271
  },
  "luminance": 0.05461
}

Semantic roles & 50–950 ramp

primary

#3F424B

secondary

#7A766C

accent

#A376B2

background

#F7F7F7

surface

#EDEDEE

border

#C8C8C9

text

#080809

muted

#7B7B7B

Preview Lab

Preview with #3F424B

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

Preview Lab → · Contrast checker → · Palette generator →