#284EA0#284EA0

#284EA0 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.4% C 0.140 H 263.2°. Best body text is #FFFFFF at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#284EA0
RGB	rgb(40, 78, 160)
HSL	hsl(221, 60%, 39%)
HSV	hsv(221, 75%, 63%)
CMYK	cmyk(75%, 51.2%, 0%, 37.3%)
CIE-LAB	lab(34.88, 16.29, -48.44)
CIE-LCH	lch(34.88, 51.11, 288.59°)
OKLab	oklab(44.42% -0.0167 -0.1393)
OKLCH	oklch(44.42% 0.14 263.2)
XYZ	xyz(9.9424, 8.4369, 34.3554)
Luminance	0.0844 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EA0 #A07A28

analogous

#288AA0 #284EA0 #3E28A0

triadic

#284EA0 #A0284E #4EA028

tetradic

#284EA0 #A0288A #A07A28 #28A03E

square

#284EA0 #A0288A #A07A28 #28A03E

split-complementary

#284EA0 #A03E28 #8AA028

monochromatic

#101E3E #1C366F #284EA0 #3867CD #698DD9

Accessibility & contrast

On white

7.81

#284EA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#284EA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EA0

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EA0	#FFFFFF	#000000	##FFFFFF
##284EA0	1.00	7.81	2.69	7.81
#FFFFFF	7.81	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C58A3

Deuteranopia (green-blind)

#004D9E

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284ea0;
/* rgb */ color: rgb(40, 78, 160);
/* oklch */ color: oklch(44.4% 0.140 263.2);

Tailwind

colors: {
  custom: {
    50: '#737fbd',
    500: '#284ea0',
    950: '#000000',
  },
}

SCSS

$custom: #284ea0;
$custom-light: #737fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284ea0",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 160
  },
  "hsl": {
    "h": 221,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.44421,
    "c": 0.14025,
    "h": 263.2
  },
  "luminance": 0.08438
}

Semantic roles & 50–950 ramp

primary

#284EA0

secondary

#C0A364

accent

#B145E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284EA0

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

Preview Lab → · Contrast checker → · Palette generator →