#283B75#283B75

#283B75 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.0% C 0.102 H 267.6°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#283B75
RGB	rgb(40, 59, 117)
HSL	hsl(225, 49%, 31%)
HSV	hsv(225, 66%, 46%)
CMYK	cmyk(65.8%, 49.6%, 0%, 54.1%)
CIE-LAB	lab(26.34, 12.62, -35.67)
CIE-LCH	lch(26.34, 37.84, 289.48°)
OKLab	oklab(36.95% -0.0043 -0.102)
OKLCH	oklch(36.95% 0.102 267.6)
XYZ	xyz(5.6488, 4.8629, 17.4671)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B75 #756228

analogous

#286175 #283B75 #3B2875

triadic

#283B75 #75283B #3B7528

tetradic

#283B75 #752861 #756228 #28753B

square

#283B75 #752861 #756228 #28753B

split-complementary

#283B75 #753B28 #617528

monochromatic

#090D1A #182447 #283B75 #3852A3 #536FC4

Accessibility & contrast

On white

10.65

#283B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B75

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B75	#FFFFFF	#000000	##FFFFFF
##283B75	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4277

Deuteranopia (green-blind)

#0F3B74

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283b75;
/* rgb */ color: rgb(40, 59, 117);
/* oklch */ color: oklch(37.0% 0.102 267.6);

Tailwind

colors: {
  custom: {
    50: '#6a709d',
    500: '#283b75',
    950: '#000000',
  },
}

SCSS

$custom: #283b75;
$custom-light: #6a709d;
$custom-dark: #000000;

JSON

{
  "hex": "#283b75",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 117
  },
  "hsl": {
    "h": 225.195,
    "s": 49.045,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36954,
    "c": 0.10211,
    "h": 267.6
  },
  "luminance": 0.04863
}

Semantic roles & 50–950 ramp

primary

#283B75

secondary

#A79252

accent

#B74FD9

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283B75

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

Preview Lab → · Contrast checker → · Palette generator →