#283F4B#283F4B

#283F4B is a dark, muted cyan. Relative luminance 0.045; OKLCH L 35.4% C 0.035 H 231.8°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#283F4B
RGB	rgb(40, 63, 75)
HSL	hsl(201, 30%, 23%)
HSV	hsv(201, 47%, 29%)
CMYK	cmyk(46.7%, 16%, 0%, 70.6%)
CIE-LAB	lab(25.30, -5.25, -10.11)
CIE-LCH	lch(25.30, 11.39, 242.58°)
OKLab	oklab(35.39% -0.0219 -0.0279)
OKLCH	oklch(35.39% 0.036 231.8)
XYZ	xyz(3.9221, 4.5139, 7.3198)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F4B #4B3428

analogous

#284B45 #283F4B #282E4B

triadic

#283F4B #4B283F #3F4B28

tetradic

#283F4B #45284B #4B3428 #2E4B28

square

#283F4B #45284B #4B3428 #2E4B28

split-complementary

#283F4B #4B282E #4B4528

monochromatic

#0B1114 #131D23 #283F4B #3D6173 #53829B

Accessibility & contrast

On white

11.04

#283F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#283F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F4B

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F4B	#FFFFFF	#000000	##FFFFFF
##283F4B	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4C

Deuteranopia (green-blind)

#343A4B

Tritanopia (blue-blind)

#1A4243

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283f4b;
/* rgb */ color: rgb(40, 63, 75);
/* oklch */ color: oklch(35.4% 0.035 231.8);

Tailwind

colors: {
  custom: {
    50: '#64747d',
    500: '#283f4b',
    950: '#000000',
  },
}

SCSS

$custom: #283f4b;
$custom-light: #64747d;
$custom-dark: #000000;

JSON

{
  "hex": "#283f4b",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 75
  },
  "hsl": {
    "h": 200.571,
    "s": 30.435,
    "l": 22.549
  },
  "oklch": {
    "l": 0.35392,
    "c": 0.0355,
    "h": 231.8
  },
  "luminance": 0.04514
}

Semantic roles & 50–950 ramp

primary

#283F4B

secondary

#7D6051

accent

#8461C7

background

#F6F7F7

surface

#EBEDEE

border

#C6C8C9

text

#050809

muted

#7A7B7B

Preview Lab

Preview with #283F4B

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

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