#283B4F#283B4F

#283B4F is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.5% C 0.043 H 250.4°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#283B4F
RGB	rgb(40, 59, 79)
HSL	hsl(211, 33%, 23%)
HSV	hsv(211, 49%, 31%)
CMYK	cmyk(49.4%, 25.3%, 0%, 69%)
CIE-LAB	lab(24.14, -1.30, -14.53)
CIE-LCH	lch(24.14, 14.59, 264.88°)
OKLab	oklab(34.53% -0.0144 -0.0404)
OKLCH	oklch(34.53% 0.043 250.4)
XYZ	xyz(3.8498, 4.1433, 7.9925)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B4F #4F3C28

analogous

#284E4F #283B4F #28284F

triadic

#283B4F #4F283B #3B4F28

tetradic

#283B4F #4F284E #4F3C28 #284F28

square

#283B4F #4F284E #4F3C28 #284F28

split-complementary

#283B4F #4F2828 #4E4F28

monochromatic

#0A0F14 #131D26 #283B4F #3D5978 #5178A0

Accessibility & contrast

On white

11.48

#283B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#283B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B4F

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B4F	#FFFFFF	#000000	##FFFFFF
##283B4F	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#333C50

Deuteranopia (green-blind)

#2E384F

Tritanopia (blue-blind)

#184042

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #283b4f;
/* rgb */ color: rgb(40, 59, 79);
/* oklch */ color: oklch(34.5% 0.043 250.4);

Tailwind

colors: {
  custom: {
    50: '#647080',
    500: '#283b4f',
    950: '#000000',
  },
}

SCSS

$custom: #283b4f;
$custom-light: #647080;
$custom-dark: #000000;

JSON

{
  "hex": "#283b4f",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 79
  },
  "hsl": {
    "h": 210.769,
    "s": 32.773,
    "l": 23.333
  },
  "oklch": {
    "l": 0.34532,
    "c": 0.04294,
    "h": 250.4
  },
  "luminance": 0.04144
}

Semantic roles & 50–950 ramp

primary

#283B4F

secondary

#826A51

accent

#955FC9

background

#F6F6F7

surface

#EBECEE

border

#C6C7C9

text

#05070A

muted

#7A7A7C

Preview Lab

Preview with #283B4F

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

Preview Lab → · Contrast checker → · Palette generator →