#283AB0#283AB0

#283AB0 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.9% C 0.187 H 269.3°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#283AB0
RGB	rgb(40, 58, 176)
HSL	hsl(232, 63%, 42%)
HSV	hsv(232, 77%, 69%)
CMYK	cmyk(77.3%, 67%, 0%, 31%)
CIE-LAB	lab(30.90, 35.60, -64.49)
CIE-LCH	lch(30.90, 73.67, 298.90°)
OKLab	oklab(41.86% -0.0022 -0.1866)
OKLCH	oklch(41.86% 0.187 269.3)
XYZ	xyz(10.2219, 6.6107, 41.8031)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.34

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283AB0 #B09E28

analogous

#287EB0 #283AB0 #5A28B0

triadic

#283AB0 #B0283A #3AB028

tetradic

#283AB0 #B0287E #B09E28 #28B05A

square

#283AB0 #B0287E #B09E28 #28B05A

split-complementary

#283AB0 #B05A28 #7EB028

monochromatic

#11194C #1D2A7E #283AB0 #4155D4 #7381DF

Accessibility & contrast

On white

9.04

#283AB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283AB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283AB0

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283AB0	#FFFFFF	#000000	##FFFFFF
##283AB0	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#005A70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283ab0;
/* rgb */ color: rgb(40, 58, 176);
/* oklch */ color: oklch(41.9% 0.187 269.3);

Tailwind

colors: {
  custom: {
    50: '#7870c9',
    500: '#283ab0',
    950: '#000000',
  },
}

SCSS

$custom: #283ab0;
$custom-light: #7870c9;
$custom-dark: #000000;

JSON

{
  "hex": "#283ab0",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 176
  },
  "hsl": {
    "h": 232.059,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.4186,
    "c": 0.18666,
    "h": 269.3
  },
  "luminance": 0.06612
}

Semantic roles & 50–950 ramp

primary

#283AB0

secondary

#C6BB6D

accent

#D042E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #283AB0

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

Preview Lab → · Contrast checker → · Palette generator →