#283D4E#283D4E

#283D4E is a dark, muted cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.040 H 243.7°. Best body text is #FFFFFF at 11.24:1 contrast (WCAG AA passes).

Color values

HEX	#283D4E
RGB	rgb(40, 61, 78)
HSL	hsl(207, 32%, 23%)
HSV	hsv(207, 49%, 31%)
CMYK	cmyk(48.7%, 21.8%, 0%, 69.4%)
CIE-LAB	lab(24.76, -2.96, -12.92)
CIE-LCH	lch(24.76, 13.25, 257.09°)
OKLab	oklab(35.01% -0.0177 -0.0358)
OKLCH	oklch(35.01% 0.04 243.7)
XYZ	xyz(3.9185, 4.3384, 7.8372)
Luminance	0.0434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D4E #4E3928

analogous

#284E4C #283D4E #282A4E

triadic

#283D4E #4E283D #3D4E28

tetradic

#283D4E #4C284E #4E3928 #2A4E28

square

#283D4E #4C284E #4E3928 #2A4E28

split-complementary

#283D4E #4E282A #4E4C28

monochromatic

#0A1014 #131D26 #283D4E #3D5D76 #517C9F

Accessibility & contrast

On white

11.24

#283D4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#283D4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D4E

11.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D4E	#FFFFFF	#000000	##FFFFFF
##283D4E	1.00	11.24	1.87	11.24
#FFFFFF	11.24	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363D4F

Deuteranopia (green-blind)

#31394E

Tritanopia (blue-blind)

#194143

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283d4e;
/* rgb */ color: rgb(40, 61, 78);
/* oklch */ color: oklch(35.0% 0.040 243.7);

Tailwind

colors: {
  custom: {
    50: '#64727f',
    500: '#283d4e',
    950: '#000000',
  },
}

SCSS

$custom: #283d4e;
$custom-light: #64727f;
$custom-dark: #000000;

JSON

{
  "hex": "#283d4e",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 78
  },
  "hsl": {
    "h": 206.842,
    "s": 32.203,
    "l": 23.137
  },
  "oklch": {
    "l": 0.35006,
    "c": 0.03999,
    "h": 243.7
  },
  "luminance": 0.04339
}

Semantic roles & 50–950 ramp

primary

#283D4E

secondary

#816651

accent

#8E5FC8

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05080A

muted

#7A7B7C

Preview Lab

Preview with #283D4E

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

Preview Lab → · Contrast checker → · Palette generator →