#284BB5#284BB5

#284BB5 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.5% C 0.173 H 265.8°. Best body text is #FFFFFF at 7.60:1 contrast (WCAG AA passes).

Color values

HEX	#284BB5
RGB	rgb(40, 75, 181)
HSL	hsl(225, 64%, 43%)
HSV	hsv(225, 78%, 71%)
CMYK	cmyk(77.9%, 58.6%, 0%, 29%)
CIE-LAB	lab(35.63, 26.38, -59.72)
CIE-LCH	lch(35.63, 65.29, 293.83°)
OKLab	oklab(45.49% -0.0127 -0.1725)
OKLCH	oklch(45.49% 0.173 265.8)
XYZ	xyz(11.7287, 8.8181, 44.7910)
Luminance	0.0882 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284BB5 #B59228

analogous

#2891B5 #284BB5 #4B28B5

triadic

#284BB5 #B5284B #4BB528

tetradic

#284BB5 #B52891 #B59228 #28B54B

square

#284BB5 #B52891 #B59228 #28B54B

split-complementary

#284BB5 #B54B28 #91B528

monochromatic

#122151 #1D3683 #284BB5 #4469D6 #7791E1

Accessibility & contrast

On white

7.60

#284BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#284BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284BB5

7.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284BB5	#FFFFFF	#000000	##FFFFFF
##284BB5	1.00	7.60	2.76	7.60
#FFFFFF	7.60	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB9

Deuteranopia (green-blind)

#004DB3

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284bb5;
/* rgb */ color: rgb(40, 75, 181);
/* oklch */ color: oklch(45.5% 0.173 265.8);

Tailwind

colors: {
  custom: {
    50: '#787ccc',
    500: '#284bb5',
    950: '#000000',
  },
}

SCSS

$custom: #284bb5;
$custom-light: #787ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#284bb5",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 181
  },
  "hsl": {
    "h": 225.106,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.4549,
    "c": 0.17297,
    "h": 265.8
  },
  "luminance": 0.08819
}

Semantic roles & 50–950 ramp

primary

#284BB5

secondary

#C8B370

accent

#BE41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284BB5

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

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