#284BB4#284BB4

#284BB4 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.4% C 0.172 H 265.7°. Best body text is #FFFFFF at 7.62:1 contrast (WCAG AA passes).

Color values

HEX	#284BB4
RGB	rgb(40, 75, 180)
HSL	hsl(225, 64%, 43%)
HSV	hsv(225, 78%, 71%)
CMYK	cmyk(77.8%, 58.3%, 0%, 29.4%)
CIE-LAB	lab(35.55, 26.00, -59.26)
CIE-LCH	lch(35.55, 64.71, 293.69°)
OKLab	oklab(45.41% -0.0128 -0.1711)
OKLCH	oklch(45.41% 0.172 265.7)
XYZ	xyz(11.6265, 8.7772, 44.2526)
Luminance	0.0878 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284BB4 #B49128

analogous

#2891B4 #284BB4 #4B28B4

triadic

#284BB4 #B4284B #4BB428

tetradic

#284BB4 #B42891 #B49128 #28B44B

square

#284BB4 #B42891 #B49128 #28B44B

split-complementary

#284BB4 #B44B28 #91B428

monochromatic

#122150 #1D3682 #284BB4 #4468D5 #7691E1

Accessibility & contrast

On white

7.62

#284BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#284BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284BB4

7.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284BB4	#FFFFFF	#000000	##FFFFFF
##284BB4	1.00	7.62	2.76	7.62
#FFFFFF	7.62	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284bb4;
/* rgb */ color: rgb(40, 75, 180);
/* oklch */ color: oklch(45.4% 0.172 265.7);

Tailwind

colors: {
  custom: {
    50: '#787ccb',
    500: '#284bb4',
    950: '#000000',
  },
}

SCSS

$custom: #284bb4;
$custom-light: #787ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#284bb4",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 180
  },
  "hsl": {
    "h": 225,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.45405,
    "c": 0.17163,
    "h": 265.7
  },
  "luminance": 0.08779
}

Semantic roles & 50–950 ramp

primary

#284BB4

secondary

#C8B270

accent

#BD41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284BB4

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

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