#283F4C#283F4C

#283F4C is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.4% C 0.037 H 234.0°. Best body text is #FFFFFF at 11.02:1 contrast (WCAG AA passes).

Color values

HEX	#283F4C
RGB	rgb(40, 63, 76)
HSL	hsl(202, 31%, 23%)
HSV	hsv(202, 47%, 30%)
CMYK	cmyk(47.4%, 17.1%, 0%, 70.2%)
CIE-LAB	lab(25.34, -4.92, -10.71)
CIE-LCH	lch(25.34, 11.78, 245.31°)
OKLab	oklab(35.44% -0.0215 -0.0296)
OKLCH	oklch(35.44% 0.037 234)
XYZ	xyz(3.9566, 4.5277, 7.5015)
Luminance	0.0453 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F4C #4C3528

analogous

#284C47 #283F4C #282D4C

triadic

#283F4C #4C283F #3F4C28

tetradic

#283F4C #47284C #4C3528 #2D4C28

square

#283F4C #47284C #4C3528 #2D4C28

split-complementary

#283F4C #4C282D #4C4728

monochromatic

#0B1114 #131E24 #283F4C #3D6074 #52819C

Accessibility & contrast

On white

11.02

#283F4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#283F4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F4C

11.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F4C	#FFFFFF	#000000	##FFFFFF
##283F4C	1.00	11.02	1.91	11.02
#FFFFFF	11.02	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	11.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4D

Deuteranopia (green-blind)

#343A4C

Tritanopia (blue-blind)

#194243

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283f4c;
/* rgb */ color: rgb(40, 63, 76);
/* oklch */ color: oklch(35.4% 0.037 234.0);

Tailwind

colors: {
  custom: {
    50: '#64747e',
    500: '#283f4c',
    950: '#000000',
  },
}

SCSS

$custom: #283f4c;
$custom-light: #64747e;
$custom-dark: #000000;

JSON

{
  "hex": "#283f4c",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 76
  },
  "hsl": {
    "h": 201.667,
    "s": 31.034,
    "l": 22.745
  },
  "oklch": {
    "l": 0.35439,
    "c": 0.03658,
    "h": 234
  },
  "luminance": 0.04528
}

Semantic roles & 50–950 ramp

primary

#283F4C

secondary

#7E6251

accent

#8661C7

background

#F6F7F7

surface

#EBEDEE

border

#C6C8C9

text

#050809

muted

#7A7B7B

Preview Lab

Preview with #283F4C

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

Preview Lab → · Contrast checker → · Palette generator →