#283A4F#283A4F

#283A4F is a dark, muted cyan. Relative luminance 0.040; OKLCH L 34.3% C 0.044 H 252.8°. Best body text is #FFFFFF at 11.61:1 contrast (WCAG AA passes).

Color values

HEX	#283A4F
RGB	rgb(40, 58, 79)
HSL	hsl(212, 33%, 23%)
HSV	hsv(212, 49%, 31%)
CMYK	cmyk(49.4%, 26.6%, 0%, 69%)
CIE-LAB	lab(23.81, -0.63, -15.05)
CIE-LCH	lch(23.81, 15.06, 267.59°)
OKLab	oklab(34.27% -0.0129 -0.0419)
OKLCH	oklch(34.27% 0.044 252.8)
XYZ	xyz(3.7989, 4.0415, 7.9755)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A4F #4F3D28

analogous

#284D4F #283A4F #29284F

triadic

#283A4F #4F283A #3A4F28

tetradic

#283A4F #4F284D #4F3D28 #284F29

square

#283A4F #4F284D #4F3D28 #284F29

split-complementary

#283A4F #4F2928 #4D4F28

monochromatic

#0A0F14 #131C26 #283A4F #3D5878 #5176A0

Accessibility & contrast

On white

11.61

#283A4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#283A4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A4F

11.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A4F	#FFFFFF	#000000	##FFFFFF
##283A4F	1.00	11.61	1.81	11.61
#FFFFFF	11.61	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323B50

Deuteranopia (green-blind)

#2D374F

Tritanopia (blue-blind)

#183F41

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #283a4f;
/* rgb */ color: rgb(40, 58, 79);
/* oklch */ color: oklch(34.3% 0.044 252.8);

Tailwind

colors: {
  custom: {
    50: '#647080',
    500: '#283a4f',
    950: '#000000',
  },
}

SCSS

$custom: #283a4f;
$custom-light: #647080;
$custom-dark: #000000;

JSON

{
  "hex": "#283a4f",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 79
  },
  "hsl": {
    "h": 212.308,
    "s": 32.773,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34272,
    "c": 0.04387,
    "h": 252.8
  },
  "luminance": 0.04042
}

Semantic roles & 50–950 ramp

primary

#283A4F

secondary

#826B51

accent

#985FC9

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05070A

muted

#7A7A7C

Preview Lab

Preview with #283A4F

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

Preview Lab → · Contrast checker → · Palette generator →