#283C40#283C40

#283C40 is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.1% C 0.026 H 211.4°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#283C40
RGB	rgb(40, 60, 64)
HSL	hsl(190, 23%, 20%)
HSV	hsv(190, 38%, 25%)
CMYK	cmyk(37.5%, 6.2%, 0%, 74.9%)
CIE-LAB	lab(23.85, -6.74, -5.02)
CIE-LCH	lch(23.85, 8.40, 216.65°)
OKLab	oklab(34.09% -0.0225 -0.0137)
OKLCH	oklch(34.09% 0.026 211.4)
XYZ	xyz(3.4160, 4.0528, 5.4518)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C40 #402C28

analogous

#284038 #283C40 #283040

triadic

#283C40 #40283C #3C4028

tetradic

#283C40 #382840 #402C28 #304028

square

#283C40 #382840 #402C28 #304028

split-complementary

#283C40 #402830 #403828

monochromatic

#0C1213 #10191A #283C40 #405F66 #57838B

Accessibility & contrast

On white

11.60

#283C40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#283C40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C40

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C40	#FFFFFF	#000000	##FFFFFF
##283C40	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393B40

Deuteranopia (green-blind)

#353740

Tritanopia (blue-blind)

#1F3E3D

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #283c40;
/* rgb */ color: rgb(40, 60, 64);
/* oklch */ color: oklch(34.1% 0.026 211.4);

Tailwind

colors: {
  custom: {
    50: '#637174',
    500: '#283c40',
    950: '#000000',
  },
}

SCSS

$custom: #283c40;
$custom-light: #637174;
$custom-dark: #000000;

JSON

{
  "hex": "#283c40",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 64
  },
  "hsl": {
    "h": 190,
    "s": 23.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.3409,
    "c": 0.02634,
    "h": 211.4
  },
  "luminance": 0.04053
}

Semantic roles & 50–950 ramp

primary

#283C40

secondary

#725752

accent

#7768C0

background

#F5F6F7

surface

#EAECED

border

#C6C7C8

text

#050708

muted

#797A7B

Preview Lab

Preview with #283C40

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

Preview Lab → · Contrast checker → · Palette generator →