#283BA0#283BA0

#283BA0 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.5% C 0.164 H 269.3°. Best body text is #FFFFFF at 9.44:1 contrast (WCAG AA passes).

Color values

HEX	#283BA0
RGB	rgb(40, 59, 160)
HSL	hsl(231, 60%, 39%)
HSV	hsv(231, 75%, 63%)
CMYK	cmyk(75%, 63.1%, 0%, 37.3%)
CIE-LAB	lab(29.70, 29.04, -56.84)
CIE-LCH	lch(29.70, 63.83, 297.06°)
OKLab	oklab(40.53% -0.002 -0.1643)
OKLCH	oklch(40.53% 0.164 269.3)
XYZ	xyz(8.7820, 6.1162, 33.9686)
Luminance	0.0612 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283BA0 #A08D28

analogous

#2877A0 #283BA0 #5128A0

triadic

#283BA0 #A0283B #3BA028

tetradic

#283BA0 #A02877 #A08D28 #28A051

square

#283BA0 #A02877 #A08D28 #28A051

split-complementary

#283BA0 #A05128 #77A028

monochromatic

#10173E #1C296F #283BA0 #3850CD #697BD9

Accessibility & contrast

On white

9.44

#283BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#283BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283BA0

9.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283BA0	#FFFFFF	#000000	##FFFFFF
##283BA0	1.00	9.44	2.22	9.44
#FFFFFF	9.44	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00409E

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283ba0;
/* rgb */ color: rgb(40, 59, 160);
/* oklch */ color: oklch(40.5% 0.164 269.3);

Tailwind

colors: {
  custom: {
    50: '#7470bd',
    500: '#283ba0',
    950: '#000000',
  },
}

SCSS

$custom: #283ba0;
$custom-light: #7470bd;
$custom-dark: #000000;

JSON

{
  "hex": "#283ba0",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 160
  },
  "hsl": {
    "h": 230.5,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.40535,
    "c": 0.16427,
    "h": 269.3
  },
  "luminance": 0.06117
}

Semantic roles & 50–950 ramp

primary

#283BA0

secondary

#C0B164

accent

#CA45E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283BA0

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

Preview Lab → · Contrast checker → · Palette generator →