#283F5E#283F5E

#283F5E is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.4% C 0.061 H 256.2°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#283F5E
RGB	rgb(40, 63, 94)
HSL	hsl(214, 40%, 26%)
HSV	hsv(214, 57%, 37%)
CMYK	cmyk(57.4%, 33%, 0%, 63.1%)
CIE-LAB	lab(26.20, 1.27, -21.15)
CIE-LCH	lch(26.20, 21.19, 273.45°)
OKLab	oklab(36.39% -0.0146 -0.0595)
OKLCH	oklch(36.39% 0.061 256.2)
XYZ	xyz(4.6723, 4.8139, 11.2705)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F5E #5E4728

analogous

#285A5E #283F5E #2C285E

triadic

#283F5E #5E283F #3F5E28

tetradic

#283F5E #5E285A #5E4728 #285E2C

square

#283F5E #5E285A #5E4728 #285E2C

split-complementary

#283F5E #5E2C28 #5A5E28

monochromatic

#090E15 #162233 #283F5E #3A5C89 #4D79B3

Accessibility & contrast

On white

10.70

#283F5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#283F5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F5E

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F5E	#FFFFFF	#000000	##FFFFFF
##283F5E	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33415F

Deuteranopia (green-blind)

#2C3C5D

Tritanopia (blue-blind)

#09464A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283f5e;
/* rgb */ color: rgb(40, 63, 94);
/* oklch */ color: oklch(36.4% 0.061 256.2);

Tailwind

colors: {
  custom: {
    50: '#66738c',
    500: '#283f5e',
    950: '#000000',
  },
}

SCSS

$custom: #283f5e;
$custom-light: #66738c;
$custom-dark: #000000;

JSON

{
  "hex": "#283f5e",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 94
  },
  "hsl": {
    "h": 214.444,
    "s": 40.299,
    "l": 26.275
  },
  "oklch": {
    "l": 0.36392,
    "c": 0.06126,
    "h": 256.2
  },
  "luminance": 0.04814
}

Semantic roles & 50–950 ramp

primary

#283F5E

secondary

#917651

accent

#9D58D0

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#06080C

muted

#7A7B7D

Preview Lab

Preview with #283F5E

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

Preview Lab → · Contrast checker → · Palette generator →