#284EA1#284EA1

#284EA1 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.5% C 0.142 H 263.3°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#284EA1
RGB	rgb(40, 78, 161)
HSL	hsl(221, 60%, 39%)
HSV	hsv(221, 75%, 63%)
CMYK	cmyk(75.2%, 51.6%, 0%, 36.9%)
CIE-LAB	lab(34.95, 16.68, -48.93)
CIE-LCH	lch(34.95, 51.69, 288.83°)
OKLab	oklab(44.5% -0.0165 -0.1407)
OKLCH	oklch(44.5% 0.142 263.3)
XYZ	xyz(10.0302, 8.4720, 34.8179)
Luminance	0.0847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EA1 #A17B28

analogous

#288BA1 #284EA1 #3F28A1

triadic

#284EA1 #A1284E #4EA128

tetradic

#284EA1 #A1288B #A17B28 #28A13F

square

#284EA1 #A1288B #A17B28 #28A13F

split-complementary

#284EA1 #A13F28 #8BA128

monochromatic

#101F3F #1C3670 #284EA1 #3967CE #6A8DDA

Accessibility & contrast

On white

7.79

#284EA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#284EA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EA1

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EA1	#FFFFFF	#000000	##FFFFFF
##284EA1	1.00	7.79	2.69	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A58A4

Deuteranopia (green-blind)

#004D9F

Tritanopia (blue-blind)

#006270

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284ea1;
/* rgb */ color: rgb(40, 78, 161);
/* oklch */ color: oklch(44.5% 0.142 263.3);

Tailwind

colors: {
  custom: {
    50: '#737fbd',
    500: '#284ea1',
    950: '#000000',
  },
}

SCSS

$custom: #284ea1;
$custom-light: #737fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284ea1",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 161
  },
  "hsl": {
    "h": 221.157,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44497,
    "c": 0.14167,
    "h": 263.3
  },
  "luminance": 0.08473
}

Semantic roles & 50–950 ramp

primary

#284EA1

secondary

#C0A365

accent

#B144E3

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284EA1

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

Preview Lab → · Contrast checker → · Palette generator →