#283F4A#283F4A

#283F4A is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.3% C 0.034 H 229.5°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#283F4A
RGB	rgb(40, 63, 74)
HSL	hsl(199, 30%, 22%)
HSV	hsv(199, 46%, 29%)
CMYK	cmyk(45.9%, 14.9%, 0%, 71%)
CIE-LAB	lab(25.26, -5.57, -9.52)
CIE-LCH	lch(25.26, 11.02, 239.67°)
OKLab	oklab(35.35% -0.0224 -0.0262)
OKLCH	oklch(35.35% 0.034 229.5)
XYZ	xyz(3.8882, 4.5003, 7.1410)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F4A #4A3328

analogous

#284A44 #283F4A #282E4A

triadic

#283F4A #4A283F #3F4A28

tetradic

#283F4A #44284A #4A3328 #2E4A28

square

#283F4A #44284A #4A3328 #2E4A28

split-complementary

#283F4A #4A282E #4A4428

monochromatic

#0B1114 #131D22 #283F4A #3D6172 #538399

Accessibility & contrast

On white

11.05

#283F4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#283F4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F4A

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F4A	#FFFFFF	#000000	##FFFFFF
##283F4A	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4B

Deuteranopia (green-blind)

#343A4A

Tritanopia (blue-blind)

#1A4242

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283f4a;
/* rgb */ color: rgb(40, 63, 74);
/* oklch */ color: oklch(35.3% 0.034 229.5);

Tailwind

colors: {
  custom: {
    50: '#64747c',
    500: '#283f4a',
    950: '#000000',
  },
}

SCSS

$custom: #283f4a;
$custom-light: #64747c;
$custom-dark: #000000;

JSON

{
  "hex": "#283f4a",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 74
  },
  "hsl": {
    "h": 199.412,
    "s": 29.825,
    "l": 22.353
  },
  "oklch": {
    "l": 0.35345,
    "c": 0.03449,
    "h": 229.5
  },
  "luminance": 0.04501
}

Semantic roles & 50–950 ramp

primary

#283F4A

secondary

#7C5F51

accent

#8262C6

background

#F6F7F7

surface

#EBEDEE

border

#C6C8C9

text

#050809

muted

#7A7B7B

Preview Lab

Preview with #283F4A

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

Preview Lab → · Contrast checker → · Palette generator →