#284AA1#284AA1

#284AA1 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.6% C 0.147 H 264.8°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#284AA1
RGB	rgb(40, 74, 161)
HSL	hsl(223, 60%, 39%)
HSV	hsv(223, 75%, 63%)
CMYK	cmyk(75.2%, 54%, 0%, 36.9%)
CIE-LAB	lab(33.82, 19.37, -50.75)
CIE-LCH	lch(33.82, 54.32, 290.89°)
OKLab	oklab(43.64% -0.0132 -0.1461)
OKLCH	oklch(43.64% 0.147 264.8)
XYZ	xyz(9.7546, 7.9208, 34.7261)
Luminance	0.0792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AA1 #A17F28

analogous

#2887A1 #284AA1 #4228A1

triadic

#284AA1 #A1284A #4AA128

tetradic

#284AA1 #A12887 #A17F28 #28A142

square

#284AA1 #A12887 #A17F28 #28A142

split-complementary

#284AA1 #A14228 #87A128

monochromatic

#101D3F #1C3370 #284AA1 #3962CE #6A89DA

Accessibility & contrast

On white

8.13

#284AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AA1

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AA1	#FFFFFF	#000000	##FFFFFF
##284AA1	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0855A4

Deuteranopia (green-blind)

#004A9F

Tritanopia (blue-blind)

#005F6E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284aa1;
/* rgb */ color: rgb(40, 74, 161);
/* oklch */ color: oklch(43.6% 0.147 264.8);

Tailwind

colors: {
  custom: {
    50: '#737cbd',
    500: '#284aa1',
    950: '#000000',
  },
}

SCSS

$custom: #284aa1;
$custom-light: #737cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284aa1",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 161
  },
  "hsl": {
    "h": 223.14,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43639,
    "c": 0.14675,
    "h": 264.8
  },
  "luminance": 0.07922
}

Semantic roles & 50–950 ramp

primary

#284AA1

secondary

#C0A665

accent

#B744E3

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284AA1

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

Preview Lab → · Contrast checker → · Palette generator →