#283565#283565

#283565 is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.4% C 0.086 H 270.0°. Best body text is #FFFFFF at 11.75:1 contrast (WCAG AA passes).

Color values

HEX	#283565
RGB	rgb(40, 53, 101)
HSL	hsl(227, 43%, 28%)
HSV	hsv(227, 60%, 40%)
CMYK	cmyk(60.4%, 47.5%, 0%, 60.4%)
CIE-LAB	lab(23.46, 10.74, -30.02)
CIE-LCH	lch(23.46, 31.89, 289.69°)
OKLab	oklab(34.41% 0.0001 -0.0855)
OKLCH	oklch(34.41% 0.086 270)
XYZ	xyz(4.4964, 3.9366, 12.8323)
Luminance	0.0394 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283565 #655828

analogous

#285365 #283565 #392865

triadic

#283565 #652835 #356528

tetradic

#283565 #652853 #655828 #286539

square

#283565 #652853 #655828 #286539

split-complementary

#283565 #653928 #536528

monochromatic

#090C16 #171E39 #283565 #394C91 #4E65B9

Accessibility & contrast

On white

11.75

#283565 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#283565 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283565

11.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283565	#FFFFFF	#000000	##FFFFFF
##283565	1.00	11.75	1.79	11.75
#FFFFFF	11.75	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3B67

Deuteranopia (green-blind)

#173564

Tritanopia (blue-blind)

#024048

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #283565;
/* rgb */ color: rgb(40, 53, 101);
/* oklch */ color: oklch(34.4% 0.086 270.0);

Tailwind

colors: {
  custom: {
    50: '#686b91',
    500: '#283565',
    950: '#000000',
  },
}

SCSS

$custom: #283565;
$custom-light: #686b91;
$custom-dark: #000000;

JSON

{
  "hex": "#283565",
  "rgb": {
    "r": 40,
    "g": 53,
    "b": 101
  },
  "hsl": {
    "h": 227.213,
    "s": 43.262,
    "l": 27.647
  },
  "oklch": {
    "l": 0.34409,
    "c": 0.0855,
    "h": 270
  },
  "luminance": 0.03937
}

Semantic roles & 50–950 ramp

primary

#283565

secondary

#988951

accent

#B855D3

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#06060D

muted

#7A7A7D

Preview Lab

Preview with #283565

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

Preview Lab → · Contrast checker → · Palette generator →