#283E4E#283E4E

#283E4E is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.3% C 0.039 H 240.8°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#283E4E
RGB	rgb(40, 62, 78)
HSL	hsl(205, 32%, 23%)
HSV	hsv(205, 49%, 31%)
CMYK	cmyk(48.7%, 20.5%, 0%, 69.4%)
CIE-LAB	lab(25.09, -3.62, -12.40)
CIE-LCH	lch(25.09, 12.92, 253.75°)
OKLab	oklab(35.27% -0.0192 -0.0344)
OKLCH	oklch(35.27% 0.039 240.8)
XYZ	xyz(3.9724, 4.4462, 7.8551)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283E4E #4E3828

analogous

#284E4B #283E4E #282B4E

triadic

#283E4E #4E283E #3E4E28

tetradic

#283E4E #4B284E #4E3828 #2B4E28

square

#283E4E #4B284E #4E3828 #2B4E28

split-complementary

#283E4E #4E282B #4E4B28

monochromatic

#0A1014 #131E26 #283E4E #3D5E76 #517E9F

Accessibility & contrast

On white

11.12

#283E4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#283E4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283E4E

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283E4E	#FFFFFF	#000000	##FFFFFF
##283E4E	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#373E4F

Deuteranopia (green-blind)

#323A4E

Tritanopia (blue-blind)

#184243

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #283e4e;
/* rgb */ color: rgb(40, 62, 78);
/* oklch */ color: oklch(35.3% 0.039 240.8);

Tailwind

colors: {
  custom: {
    50: '#64737f',
    500: '#283e4e',
    950: '#000000',
  },
}

SCSS

$custom: #283e4e;
$custom-light: #64737f;
$custom-dark: #000000;

JSON

{
  "hex": "#283e4e",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 78
  },
  "hsl": {
    "h": 205.263,
    "s": 32.203,
    "l": 23.137
  },
  "oklch": {
    "l": 0.3527,
    "c": 0.03938,
    "h": 240.8
  },
  "luminance": 0.04446
}

Semantic roles & 50–950 ramp

primary

#283E4E

secondary

#816551

accent

#8C5FC8

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05080A

muted

#7A7B7C

Preview Lab

Preview with #283E4E

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

Preview Lab → · Contrast checker → · Palette generator →