#283A73#283A73

#283A73 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.6% C 0.100 H 268.0°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#283A73
RGB	rgb(40, 58, 115)
HSL	hsl(226, 48%, 30%)
HSV	hsv(226, 65%, 45%)
CMYK	cmyk(65.2%, 49.6%, 0%, 54.9%)
CIE-LAB	lab(25.91, 12.55, -35.10)
CIE-LCH	lch(25.91, 37.28, 289.68°)
OKLab	oklab(36.58% -0.0035 -0.1003)
OKLCH	oklch(36.58% 0.1 268)
XYZ	xyz(5.4816, 4.7146, 16.8375)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A73 #736128

analogous

#285F73 #283A73 #3B2873

triadic

#283A73 #73283A #3A7328

tetradic

#283A73 #73285F #736128 #28733B

square

#283A73 #73285F #736128 #28733B

split-complementary

#283A73 #733B28 #5F7328

monochromatic

#080C18 #182346 #283A73 #3851A0 #526DC3

Accessibility & contrast

On white

10.81

#283A73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#283A73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A73

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A73	#FFFFFF	#000000	##FFFFFF
##283A73	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)

#1E4175

Deuteranopia (green-blind)

#103A72

Tritanopia (blue-blind)

#004751

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #283a73;
/* rgb */ color: rgb(40, 58, 115);
/* oklch */ color: oklch(36.6% 0.100 268.0);

Tailwind

colors: {
  custom: {
    50: '#6a6f9c',
    500: '#283a73',
    950: '#000000',
  },
}

SCSS

$custom: #283a73;
$custom-light: #6a6f9c;
$custom-dark: #000000;

JSON

{
  "hex": "#283a73",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 115
  },
  "hsl": {
    "h": 225.6,
    "s": 48.387,
    "l": 30.392
  },
  "oklch": {
    "l": 0.36578,
    "c": 0.10041,
    "h": 268
  },
  "luminance": 0.04715
}

Semantic roles & 50–950 ramp

primary

#283A73

secondary

#A59152

accent

#B750D8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #283A73

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

Preview Lab → · Contrast checker → · Palette generator →