#283F4D#283F4D

#283F4D is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.5% C 0.038 H 236.0°. Best body text is #FFFFFF at 11.00:1 contrast (WCAG AA passes).

Color values

HEX	#283F4D
RGB	rgb(40, 63, 77)
HSL	hsl(203, 32%, 23%)
HSV	hsv(203, 48%, 30%)
CMYK	cmyk(48.1%, 18.2%, 0%, 69.8%)
CIE-LAB	lab(25.39, -4.59, -11.30)
CIE-LCH	lch(25.39, 12.20, 247.87°)
OKLab	oklab(35.49% -0.0211 -0.0313)
OKLCH	oklch(35.49% 0.038 236)
XYZ	xyz(3.9917, 4.5417, 7.6860)
Luminance	0.0454 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F4D #4D3628

analogous

#284D48 #283F4D #282C4D

triadic

#283F4D #4D283F #3F4D28

tetradic

#283F4D #48284D #4D3628 #2C4D28

square

#283F4D #48284D #4D3628 #2C4D28

split-complementary

#283F4D #4D282C #4D4828

monochromatic

#0A1014 #131E25 #283F4D #3D6075 #52819E

Accessibility & contrast

On white

11.00

#283F4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#283F4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F4D

11.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F4D	#FFFFFF	#000000	##FFFFFF
##283F4D	1.00	11.00	1.91	11.00
#FFFFFF	11.00	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4E

Deuteranopia (green-blind)

#333A4D

Tritanopia (blue-blind)

#194344

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283f4d;
/* rgb */ color: rgb(40, 63, 77);
/* oklch */ color: oklch(35.5% 0.038 236.0);

Tailwind

colors: {
  custom: {
    50: '#64747e',
    500: '#283f4d',
    950: '#000000',
  },
}

SCSS

$custom: #283f4d;
$custom-light: #64747e;
$custom-dark: #000000;

JSON

{
  "hex": "#283f4d",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 77
  },
  "hsl": {
    "h": 202.703,
    "s": 31.624,
    "l": 22.941
  },
  "oklch": {
    "l": 0.35487,
    "c": 0.0377,
    "h": 236
  },
  "luminance": 0.04542
}

Semantic roles & 50–950 ramp

primary

#283F4D

secondary

#806351

accent

#8760C8

background

#F6F7F7

surface

#EBEDEE

border

#C6C8C9

text

#05080A

muted

#7A7B7C

Preview Lab

Preview with #283F4D

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

Preview Lab → · Contrast checker → · Palette generator →