#284EA5#284EA5

#284EA5 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.8% C 0.147 H 263.7°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#284EA5
RGB	rgb(40, 78, 165)
HSL	hsl(222, 61%, 40%)
HSV	hsv(222, 76%, 65%)
CMYK	cmyk(75.8%, 52.7%, 0%, 35.3%)
CIE-LAB	lab(35.23, 18.23, -50.86)
CIE-LCH	lch(35.23, 54.03, 289.72°)
OKLab	oklab(44.81% -0.0161 -0.1464)
OKLCH	oklch(44.81% 0.147 263.7)
XYZ	xyz(10.3886, 8.6154, 36.7054)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EA5 #A57F28

analogous

#288CA5 #284EA5 #4028A5

triadic

#284EA5 #A5284E #4EA528

tetradic

#284EA5 #A5288C #A57F28 #28A540

square

#284EA5 #A5288C #A57F28 #28A540

split-complementary

#284EA5 #A54028 #8CA528

monochromatic

#101F42 #1C3774 #284EA5 #3B68CF #6C8EDB

Accessibility & contrast

On white

7.71

#284EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#284EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EA5

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EA5	#FFFFFF	#000000	##FFFFFF
##284EA5	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1359A8

Deuteranopia (green-blind)

#004DA3

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284ea5;
/* rgb */ color: rgb(40, 78, 165);
/* oklch */ color: oklch(44.8% 0.147 263.7);

Tailwind

colors: {
  custom: {
    50: '#747fc0',
    500: '#284ea5',
    950: '#000000',
  },
}

SCSS

$custom: #284ea5;
$custom-light: #747fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#284ea5",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 165
  },
  "hsl": {
    "h": 221.76,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.44805,
    "c": 0.14727,
    "h": 263.7
  },
  "luminance": 0.08617
}

Semantic roles & 50–950 ramp

primary

#284EA5

secondary

#C2A667

accent

#B344E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284EA5

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

Preview Lab → · Contrast checker → · Palette generator →