#283F54#283F54

#283F54 is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.8% C 0.047 H 247.0°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#283F54
RGB	rgb(40, 63, 84)
HSL	hsl(209, 35%, 24%)
HSV	hsv(209, 52%, 33%)
CMYK	cmyk(52.4%, 25%, 0%, 67.1%)
CIE-LAB	lab(25.70, -2.25, -15.41)
CIE-LCH	lch(25.70, 15.57, 261.71°)
OKLab	oklab(35.84% -0.0182 -0.0429)
OKLCH	oklch(35.84% 0.047 247)
XYZ	xyz(4.2523, 4.6459, 9.0585)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F54 #543D28

analogous

#285453 #283F54 #282954

triadic

#283F54 #54283F #3F5428

tetradic

#283F54 #532854 #543D28 #295428

square

#283F54 #532854 #543D28 #295428

split-complementary

#283F54 #542829 #545328

monochromatic

#0A1015 #14202B #283F54 #3C5E7D #4F7DA7

Accessibility & contrast

On white

10.89

#283F54 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#283F54 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F54

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F54	#FFFFFF	#000000	##FFFFFF
##283F54	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#363F55

Deuteranopia (green-blind)

#313B54

Tritanopia (blue-blind)

#144446

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f54;
/* rgb */ color: rgb(40, 63, 84);
/* oklch */ color: oklch(35.8% 0.047 247.0);

Tailwind

colors: {
  custom: {
    50: '#657384',
    500: '#283f54',
    950: '#000000',
  },
}

SCSS

$custom: #283f54;
$custom-light: #657384;
$custom-dark: #000000;

JSON

{
  "hex": "#283f54",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 84
  },
  "hsl": {
    "h": 208.636,
    "s": 35.484,
    "l": 24.314
  },
  "oklch": {
    "l": 0.35839,
    "c": 0.04665,
    "h": 247
  },
  "luminance": 0.04646
}

Semantic roles & 50–950 ramp

primary

#283F54

secondary

#876B51

accent

#915CCC

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080A

muted

#7A7B7C

Preview Lab

Preview with #283F54

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

Preview Lab → · Contrast checker → · Palette generator →