#283F5D#283F5D

#283F5D is a dark, muted cyan. Relative luminance 0.048; OKLCH L 36.3% C 0.060 H 255.5°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#283F5D
RGB	rgb(40, 63, 93)
HSL	hsl(214, 40%, 26%)
HSV	hsv(214, 57%, 36%)
CMYK	cmyk(57%, 32.3%, 0%, 63.5%)
CIE-LAB	lab(26.15, 0.91, -20.58)
CIE-LCH	lch(26.15, 20.60, 272.54°)
OKLab	oklab(36.33% -0.015 -0.0578)
OKLCH	oklch(36.33% 0.06 255.5)
XYZ	xyz(4.6277, 4.7961, 11.0357)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F5D #5D4628

analogous

#28595D #283F5D #2B285D

triadic

#283F5D #5D283F #3F5D28

tetradic

#283F5D #5D2859 #5D4628 #285D2B

square

#283F5D #5D2859 #5D4628 #285D2B

split-complementary

#283F5D #5D2B28 #595D28

monochromatic

#090E15 #162232 #283F5D #3A5C88 #4D79B2

Accessibility & contrast

On white

10.72

#283F5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#283F5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F5D

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F5D	#FFFFFF	#000000	##FFFFFF
##283F5D	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33415E

Deuteranopia (green-blind)

#2C3C5C

Tritanopia (blue-blind)

#0B464A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283f5d;
/* rgb */ color: rgb(40, 63, 93);
/* oklch */ color: oklch(36.3% 0.060 255.5);

Tailwind

colors: {
  custom: {
    50: '#66738b',
    500: '#283f5d',
    950: '#000000',
  },
}

SCSS

$custom: #283f5d;
$custom-light: #66738b;
$custom-dark: #000000;

JSON

{
  "hex": "#283f5d",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 93
  },
  "hsl": {
    "h": 213.962,
    "s": 39.85,
    "l": 26.078
  },
  "oklch": {
    "l": 0.36334,
    "c": 0.05976,
    "h": 255.5
  },
  "luminance": 0.04796
}

Semantic roles & 50–950 ramp

primary

#283F5D

secondary

#907551

accent

#9C58D0

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#06080C

muted

#7A7B7D

Preview Lab

Preview with #283F5D

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

Preview Lab → · Contrast checker → · Palette generator →