#283F5F#283F5F

#283F5F is a dark, moderate cyan. Relative luminance 0.048; OKLCH L 36.5% C 0.063 H 256.8°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#283F5F
RGB	rgb(40, 63, 95)
HSL	hsl(215, 41%, 26%)
HSV	hsv(215, 58%, 37%)
CMYK	cmyk(57.9%, 33.7%, 0%, 62.7%)
CIE-LAB	lab(26.25, 1.63, -21.72)
CIE-LCH	lch(26.25, 21.78, 274.30°)
OKLab	oklab(36.45% -0.0143 -0.0611)
OKLCH	oklch(36.45% 0.063 256.8)
XYZ	xyz(4.7174, 4.8320, 11.5083)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F5F #5F4828

analogous

#285B5F #283F5F #2D285F

triadic

#283F5F #5F283F #3F5F28

tetradic

#283F5F #5F285B #5F4828 #285F2D

square

#283F5F #5F285B #5F4828 #285F2D

split-complementary

#283F5F #5F2D28 #5B5F28

monochromatic

#090E16 #162234 #283F5F #3A5C8A #4D78B4

Accessibility & contrast

On white

10.68

#283F5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283F5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F5F

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F5F	#FFFFFF	#000000	##FFFFFF
##283F5F	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324160

Deuteranopia (green-blind)

#2B3C5E

Tritanopia (blue-blind)

#08464A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283f5f;
/* rgb */ color: rgb(40, 63, 95);
/* oklch */ color: oklch(36.5% 0.063 256.8);

Tailwind

colors: {
  custom: {
    50: '#66738c',
    500: '#283f5f',
    950: '#000000',
  },
}

SCSS

$custom: #283f5f;
$custom-light: #66738c;
$custom-dark: #000000;

JSON

{
  "hex": "#283f5f",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 95
  },
  "hsl": {
    "h": 214.909,
    "s": 40.741,
    "l": 26.471
  },
  "oklch": {
    "l": 0.36451,
    "c": 0.06278,
    "h": 256.8
  },
  "luminance": 0.04832
}

Semantic roles & 50–950 ramp

primary

#283F5F

secondary

#927751

accent

#9E57D1

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#06080C

muted

#7A7B7D

Preview Lab

Preview with #283F5F

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

Preview Lab → · Contrast checker → · Palette generator →