#284BA1#284BA1

#284BA1 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.9% C 0.145 H 264.5°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#284BA1
RGB	rgb(40, 75, 161)
HSL	hsl(223, 60%, 39%)
HSV	hsv(223, 75%, 63%)
CMYK	cmyk(75.2%, 53.4%, 0%, 36.9%)
CIE-LAB	lab(34.10, 18.69, -50.30)
CIE-LCH	lch(34.10, 53.66, 290.39°)
OKLab	oklab(43.85% -0.014 -0.1448)
OKLCH	oklch(43.85% 0.145 264.5)
XYZ	xyz(9.8219, 8.0554, 34.7485)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284BA1 #A17E28

analogous

#2888A1 #284BA1 #4228A1

triadic

#284BA1 #A1284B #4BA128

tetradic

#284BA1 #A12888 #A17E28 #28A142

square

#284BA1 #A12888 #A17E28 #28A142

split-complementary

#284BA1 #A14228 #88A128

monochromatic

#101D3F #1C3470 #284BA1 #3964CE #6A8ADA

Accessibility & contrast

On white

8.04

#284BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#284BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284BA1

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284BA1	#FFFFFF	#000000	##FFFFFF
##284BA1	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E56A4

Deuteranopia (green-blind)

#004B9F

Tritanopia (blue-blind)

#00606E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284ba1;
/* rgb */ color: rgb(40, 75, 161);
/* oklch */ color: oklch(43.9% 0.145 264.5);

Tailwind

colors: {
  custom: {
    50: '#737cbd',
    500: '#284ba1',
    950: '#000000',
  },
}

SCSS

$custom: #284ba1;
$custom-light: #737cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284ba1",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 161
  },
  "hsl": {
    "h": 222.645,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.43852,
    "c": 0.14547,
    "h": 264.5
  },
  "luminance": 0.08056
}

Semantic roles & 50–950 ramp

primary

#284BA1

secondary

#C0A665

accent

#B544E3

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284BA1

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

Preview Lab → · Contrast checker → · Palette generator →