#283F58#283F58

#283F58 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 36.1% C 0.052 H 251.4°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#283F58
RGB	rgb(40, 63, 88)
HSL	hsl(211, 38%, 25%)
HSV	hsv(211, 55%, 35%)
CMYK	cmyk(54.5%, 28.4%, 0%, 65.5%)
CIE-LAB	lab(25.89, -0.86, -17.73)
CIE-LCH	lch(25.89, 17.75, 267.22°)
OKLab	oklab(36.05% -0.0167 -0.0496)
OKLCH	oklch(36.05% 0.052 251.4)
XYZ	xyz(4.4134, 4.7104, 9.9073)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F58 #584128

analogous

#285758 #283F58 #292858

triadic

#283F58 #58283F #3F5828

tetradic

#283F58 #582857 #584128 #285829

square

#283F58 #582857 #584128 #285829

split-complementary

#283F58 #582928 #575828

monochromatic

#0A0F15 #15212E #283F58 #3B5D82 #4E7BAC

Accessibility & contrast

On white

10.81

#283F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F58

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F58	#FFFFFF	#000000	##FFFFFF
##283F58	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354059

Deuteranopia (green-blind)

#2F3B57

Tritanopia (blue-blind)

#104548

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283f58;
/* rgb */ color: rgb(40, 63, 88);
/* oklch */ color: oklch(36.1% 0.052 251.4);

Tailwind

colors: {
  custom: {
    50: '#657387',
    500: '#283f58',
    950: '#000000',
  },
}

SCSS

$custom: #283f58;
$custom-light: #657387;
$custom-dark: #000000;

JSON

{
  "hex": "#283f58",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 88
  },
  "hsl": {
    "h": 211.25,
    "s": 37.5,
    "l": 25.098
  },
  "oklch": {
    "l": 0.36053,
    "c": 0.05234,
    "h": 251.4
  },
  "luminance": 0.04711
}

Semantic roles & 50–950 ramp

primary

#283F58

secondary

#8B6F51

accent

#965ACD

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#06080B

muted

#7A7B7C

Preview Lab

Preview with #283F58

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

Preview Lab → · Contrast checker → · Palette generator →