#283DA0#283DA0

#283DA0 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.9% C 0.162 H 268.8°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#283DA0
RGB	rgb(40, 61, 160)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 63%)
CMYK	cmyk(75%, 61.9%, 0%, 37.3%)
CIE-LAB	lab(30.22, 27.71, -56.00)
CIE-LCH	lch(30.22, 62.48, 296.33°)
OKLab	oklab(40.92% -0.0034 -0.1618)
OKLCH	oklch(40.92% 0.162 268.8)
XYZ	xyz(8.8868, 6.3257, 34.0035)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283DA0 #A08B28

analogous

#2879A0 #283DA0 #4F28A0

triadic

#283DA0 #A0283D #3DA028

tetradic

#283DA0 #A02879 #A08B28 #28A04F

square

#283DA0 #A02879 #A08B28 #28A04F

split-complementary

#283DA0 #A04F28 #79A028

monochromatic

#10183E #1C2A6F #283DA0 #3852CD #697DD9

Accessibility & contrast

On white

9.27

#283DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#283DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283DA0

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283DA0	#FFFFFF	#000000	##FFFFFF
##283DA0	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA3

Deuteranopia (green-blind)

#00429E

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283da0;
/* rgb */ color: rgb(40, 61, 160);
/* oklch */ color: oklch(40.9% 0.162 268.8);

Tailwind

colors: {
  custom: {
    50: '#7472bd',
    500: '#283da0',
    950: '#000000',
  },
}

SCSS

$custom: #283da0;
$custom-light: #7472bd;
$custom-dark: #000000;

JSON

{
  "hex": "#283da0",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 160
  },
  "hsl": {
    "h": 229.5,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.40917,
    "c": 0.1618,
    "h": 268.8
  },
  "luminance": 0.06327
}

Semantic roles & 50–950 ramp

primary

#283DA0

secondary

#C0B064

accent

#C745E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #283DA0

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

Preview Lab → · Contrast checker → · Palette generator →