#283F40#283F40

#283F40 is a dark, muted teal. Relative luminance 0.044; OKLCH L 34.9% C 0.029 H 199.4°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#283F40
RGB	rgb(40, 63, 64)
HSL	hsl(183, 23%, 20%)
HSV	hsv(183, 38%, 25%)
CMYK	cmyk(37.5%, 1.6%, 0%, 74.9%)
CIE-LAB	lab(24.88, -8.63, -3.48)
CIE-LCH	lch(24.88, 9.30, 201.95°)
OKLab	oklab(34.91% -0.0271 -0.0095)
OKLCH	oklch(34.91% 0.029 199.4)
XYZ	xyz(3.5777, 4.3761, 5.5056)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F40 #402928

analogous

#284035 #283F40 #283340

triadic

#283F40 #40283F #3F4028

tetradic

#283F40 #352840 #402928 #334028

square

#283F40 #352840 #402928 #334028

split-complementary

#283F40 #402833 #403528

monochromatic

#0C1313 #101A1A #283F40 #406466 #57898B

Accessibility & contrast

On white

11.20

#283F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#283F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F40

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F40	#FFFFFF	#000000	##FFFFFF
##283F40	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C3D40

Deuteranopia (green-blind)

#383A40

Tritanopia (blue-blind)

#1F413F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283f40;
/* rgb */ color: rgb(40, 63, 64);
/* oklch */ color: oklch(34.9% 0.029 199.4);

Tailwind

colors: {
  custom: {
    50: '#637474',
    500: '#283f40',
    950: '#000000',
  },
}

SCSS

$custom: #283f40;
$custom-light: #637474;
$custom-dark: #000000;

JSON

{
  "hex": "#283f40",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 64
  },
  "hsl": {
    "h": 182.5,
    "s": 23.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.34913,
    "c": 0.02874,
    "h": 199.4
  },
  "luminance": 0.04376
}

Semantic roles & 50–950 ramp

primary

#283F40

secondary

#725352

accent

#6C68C0

background

#F5F7F7

surface

#EAEDED

border

#C6C8C8

text

#050808

muted

#797B7B

Preview Lab

Preview with #283F40

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

Preview Lab → · Contrast checker → · Palette generator →