#283CA1#283CA1

#283CA1 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.164 H 269.1°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#283CA1
RGB	rgb(40, 60, 161)
HSL	hsl(230, 60%, 39%)
HSV	hsv(230, 75%, 63%)
CMYK	cmyk(75.2%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(30.05, 28.75, -56.89)
CIE-LCH	lch(30.05, 63.74, 296.81°)
OKLab	oklab(40.82% -0.0027 -0.1644)
OKLCH	oklch(40.82% 0.164 269.1)
XYZ	xyz(8.9217, 6.2551, 34.4485)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283CA1 #A18D28

analogous

#2879A1 #283CA1 #5128A1

triadic

#283CA1 #A1283C #3CA128

tetradic

#283CA1 #A12879 #A18D28 #28A151

square

#283CA1 #A12879 #A18D28 #28A151

split-complementary

#283CA1 #A15128 #79A128

monochromatic

#10173F #1C2A70 #283CA1 #3951CE #6A7CDA

Accessibility & contrast

On white

9.33

#283CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#283CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283CA1

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283CA1	#FFFFFF	#000000	##FFFFFF
##283CA1	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #283ca1;
/* rgb */ color: rgb(40, 60, 161);
/* oklch */ color: oklch(40.8% 0.164 269.1);

Tailwind

colors: {
  custom: {
    50: '#7471be',
    500: '#283ca1',
    950: '#000000',
  },
}

SCSS

$custom: #283ca1;
$custom-light: #7471be;
$custom-dark: #000000;

JSON

{
  "hex": "#283ca1",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 230.083,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.40816,
    "c": 0.1644,
    "h": 269.1
  },
  "luminance": 0.06256
}

Semantic roles & 50–950 ramp

primary

#283CA1

secondary

#C0B165

accent

#C944E3

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #283CA1

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

Preview Lab → · Contrast checker → · Palette generator →