#284AA0#284AA0

#284AA0 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.6% C 0.145 H 264.7°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#284AA0
RGB	rgb(40, 74, 160)
HSL	hsl(223, 60%, 39%)
HSV	hsv(223, 75%, 63%)
CMYK	cmyk(75%, 53.7%, 0%, 37.3%)
CIE-LAB	lab(33.74, 18.98, -50.27)
CIE-LCH	lch(33.74, 53.73, 290.68°)
OKLab	oklab(43.56% -0.0133 -0.1447)
OKLCH	oklch(43.56% 0.145 264.7)
XYZ	xyz(9.6668, 7.8857, 34.2635)
Luminance	0.0789 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AA0 #A07E28

analogous

#2886A0 #284AA0 #4228A0

triadic

#284AA0 #A0284A #4AA028

tetradic

#284AA0 #A02886 #A07E28 #28A042

square

#284AA0 #A02886 #A07E28 #28A042

split-complementary

#284AA0 #A04228 #86A028

monochromatic

#101D3E #1C336F #284AA0 #3862CD #6989D9

Accessibility & contrast

On white

8.15

#284AA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284AA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AA0

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AA0	#FFFFFF	#000000	##FFFFFF
##284AA0	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B55A3

Deuteranopia (green-blind)

#004A9E

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284aa0;
/* rgb */ color: rgb(40, 74, 160);
/* oklch */ color: oklch(43.6% 0.145 264.7);

Tailwind

colors: {
  custom: {
    50: '#737cbd',
    500: '#284aa0',
    950: '#000000',
  },
}

SCSS

$custom: #284aa0;
$custom-light: #737cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284aa0",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 160
  },
  "hsl": {
    "h": 223,
    "s": 60,
    "l": 39.216
  },
  "oklch": {
    "l": 0.4356,
    "c": 0.14534,
    "h": 264.7
  },
  "luminance": 0.07887
}

Semantic roles & 50–950 ramp

primary

#284AA0

secondary

#C0A664

accent

#B645E3

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284AA0

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

Preview Lab → · Contrast checker → · Palette generator →