#284AB1#284AB1

#284AB1 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 45.0% C 0.169 H 265.9°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#284AB1
RGB	rgb(40, 74, 177)
HSL	hsl(225, 63%, 43%)
HSV	hsv(225, 77%, 69%)
CMYK	cmyk(77.4%, 58.2%, 0%, 30.6%)
CIE-LAB	lab(35.05, 25.52, -58.31)
CIE-LCH	lch(35.05, 63.65, 293.63°)
OKLab	oklab(44.95% -0.0122 -0.1684)
OKLCH	oklch(44.95% 0.169 265.9)
XYZ	xyz(11.2569, 8.5217, 42.6380)
Luminance	0.0852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AB1 #B18F28

analogous

#288FB1 #284AB1 #4A28B1

triadic

#284AB1 #B1284A #4AB128

tetradic

#284AB1 #B1288F #B18F28 #28B14A

square

#284AB1 #B1288F #B18F28 #28B14A

split-complementary

#284AB1 #B14A28 #8FB128

monochromatic

#11204D #1D357F #284AB1 #4266D4 #748FE0

Accessibility & contrast

On white

7.76

#284AB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#284AB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AB1

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AB1	#FFFFFF	#000000	##FFFFFF
##284AB1	1.00	7.76	2.70	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B4

Deuteranopia (green-blind)

#004CAF

Tritanopia (blue-blind)

#006476

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284ab1;
/* rgb */ color: rgb(40, 74, 177);
/* oklch */ color: oklch(45.0% 0.169 265.9);

Tailwind

colors: {
  custom: {
    50: '#777cc9',
    500: '#284ab1',
    950: '#000000',
  },
}

SCSS

$custom: #284ab1;
$custom-light: #777cc9;
$custom-dark: #000000;

JSON

{
  "hex": "#284ab1",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 177
  },
  "hsl": {
    "h": 225.109,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.44952,
    "c": 0.1688,
    "h": 265.9
  },
  "luminance": 0.08523
}

Semantic roles & 50–950 ramp

primary

#284AB1

secondary

#C7B16E

accent

#BD42E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284AB1

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

Preview Lab → · Contrast checker → · Palette generator →