#283D90#283D90

#283D90 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.5% C 0.139 H 268.5°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#283D90
RGB	rgb(40, 61, 144)
HSL	hsl(228, 57%, 36%)
HSV	hsv(228, 72%, 56%)
CMYK	cmyk(72.2%, 57.6%, 0%, 43.5%)
CIE-LAB	lab(28.91, 21.62, -48.38)
CIE-LCH	lch(28.91, 52.99, 294.08°)
OKLab	oklab(39.53% -0.0037 -0.1394)
OKLCH	oklch(39.53% 0.139 268.5)
XYZ	xyz(7.5761, 5.8015, 27.1007)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D90 #907B28

analogous

#287190 #283D90 #472890

triadic

#283D90 #90283D #3D9028

tetradic

#283D90 #902871 #907B28 #289047

square

#283D90 #902871 #907B28 #289047

split-complementary

#283D90 #904728 #719028

monochromatic

#0D1430 #1B2960 #283D90 #3551C0 #6077D3

Accessibility & contrast

On white

9.72

#283D90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#283D90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D90

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D90	#FFFFFF	#000000	##FFFFFF
##283D90	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004993

Deuteranopia (green-blind)

#00408E

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #283d90;
/* rgb */ color: rgb(40, 61, 144);
/* oklch */ color: oklch(39.5% 0.139 268.5);

Tailwind

colors: {
  custom: {
    50: '#7072b1',
    500: '#283d90',
    950: '#000000',
  },
}

SCSS

$custom: #283d90;
$custom-light: #7072b1;
$custom-dark: #000000;

JSON

{
  "hex": "#283d90",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 144
  },
  "hsl": {
    "h": 227.885,
    "s": 56.522,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39527,
    "c": 0.13943,
    "h": 268.5
  },
  "luminance": 0.05802
}

Semantic roles & 50–950 ramp

primary

#283D90

secondary

#B8A65C

accent

#C148E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283D90

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

Preview Lab → · Contrast checker → · Palette generator →