#283A91#283A91

#283A91 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.0% C 0.145 H 269.5°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#283A91
RGB	rgb(40, 58, 145)
HSL	hsl(230, 57%, 36%)
HSV	hsv(230, 72%, 57%)
CMYK	cmyk(72.4%, 60%, 0%, 43.1%)
CIE-LAB	lab(28.17, 24.05, -50.19)
CIE-LCH	lch(28.17, 55.66, 295.60°)
OKLab	oklab(39% -0.0012 -0.1447)
OKLCH	oklch(39% 0.145 269.5)
XYZ	xyz(7.4972, 5.5208, 27.4531)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A91 #917F28

analogous

#286F91 #283A91 #4B2891

triadic

#283A91 #91283A #3A9128

tetradic

#283A91 #91286F #917F28 #28914B

square

#283A91 #91286F #917F28 #28914B

split-complementary

#283A91 #914B28 #6F9128

monochromatic

#0E1431 #1B2761 #283A91 #354DC1 #6074D3

Accessibility & contrast

On white

9.98

#283A91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#283A91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A91

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A91	#FFFFFF	#000000	##FFFFFF
##283A91	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004794

Deuteranopia (green-blind)

#003E8F

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #283a91;
/* rgb */ color: rgb(40, 58, 145);
/* oklch */ color: oklch(39.0% 0.145 269.5);

Tailwind

colors: {
  custom: {
    50: '#716fb2',
    500: '#283a91',
    950: '#000000',
  },
}

SCSS

$custom: #283a91;
$custom-light: #716fb2;
$custom-dark: #000000;

JSON

{
  "hex": "#283a91",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 145
  },
  "hsl": {
    "h": 229.714,
    "s": 56.757,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39002,
    "c": 0.14475,
    "h": 269.5
  },
  "luminance": 0.05522
}

Semantic roles & 50–950 ramp

primary

#283A91

secondary

#B9A95C

accent

#C648E0

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #283A91

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

Preview Lab → · Contrast checker → · Palette generator →