#283A40#283A40

#283A40 is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.5% C 0.025 H 220.5°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#283A40
RGB	rgb(40, 58, 64)
HSL	hsl(195, 23%, 20%)
HSV	hsv(195, 38%, 25%)
CMYK	cmyk(37.5%, 9.4%, 0%, 74.9%)
CIE-LAB	lab(23.16, -5.46, -6.04)
CIE-LCH	lch(23.16, 8.14, 227.91°)
OKLab	oklab(33.55% -0.0194 -0.0165)
OKLCH	oklch(33.55% 0.025 220.5)
XYZ	xyz(3.3132, 3.8472, 5.4175)
Luminance	0.0385 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A40 #402E28

analogous

#28403A #283A40 #282E40

triadic

#283A40 #40283A #3A4028

tetradic

#283A40 #3A2840 #402E28 #2E4028

square

#283A40 #3A2840 #402E28 #2E4028

split-complementary

#283A40 #40282E #403A28

monochromatic

#0C1113 #10181A #283A40 #405C66 #577E8B

Accessibility & contrast

On white

11.87

#283A40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#283A40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A40

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A40	#FFFFFF	#000000	##FFFFFF
##283A40	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363940

Deuteranopia (green-blind)

#333640

Tritanopia (blue-blind)

#203C3C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #283a40;
/* rgb */ color: rgb(40, 58, 64);
/* oklch */ color: oklch(33.5% 0.025 220.5);

Tailwind

colors: {
  custom: {
    50: '#637074',
    500: '#283a40',
    950: '#000000',
  },
}

SCSS

$custom: #283a40;
$custom-light: #637074;
$custom-dark: #000000;

JSON

{
  "hex": "#283a40",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 64
  },
  "hsl": {
    "h": 195,
    "s": 23.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.33545,
    "c": 0.02547,
    "h": 220.5
  },
  "luminance": 0.03847
}

Semantic roles & 50–950 ramp

primary

#283A40

secondary

#725A52

accent

#7E68C0

background

#F5F6F7

surface

#EAECED

border

#C6C7C8

text

#050708

muted

#797A7B

Preview Lab

Preview with #283A40

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

Preview Lab → · Contrast checker → · Palette generator →