#284CB4#284CB4

#284CB4 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.170 H 265.5°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#284CB4
RGB	rgb(40, 76, 180)
HSL	hsl(225, 64%, 43%)
HSV	hsv(225, 78%, 71%)
CMYK	cmyk(77.8%, 57.8%, 0%, 29.4%)
CIE-LAB	lab(35.82, 25.33, -58.83)
CIE-LCH	lch(35.82, 64.05, 293.30°)
OKLab	oklab(45.61% -0.0134 -0.1699)
OKLCH	oklch(45.61% 0.17 265.5)
XYZ	xyz(11.6948, 8.9140, 44.2754)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CB4 #B49028

analogous

#2892B4 #284CB4 #4A28B4

triadic

#284CB4 #B4284C #4CB428

tetradic

#284CB4 #B42892 #B49028 #28B44A

square

#284CB4 #B42892 #B49028 #28B44A

split-complementary

#284CB4 #B44A28 #92B428

monochromatic

#122250 #1D3782 #284CB4 #4469D5 #7691E1

Accessibility & contrast

On white

7.55

#284CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#284CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CB4

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CB4	#FFFFFF	#000000	##FFFFFF
##284CB4	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#004EB2

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284cb4;
/* rgb */ color: rgb(40, 76, 180);
/* oklch */ color: oklch(45.6% 0.170 265.5);

Tailwind

colors: {
  custom: {
    50: '#787dcb',
    500: '#284cb4',
    950: '#000000',
  },
}

SCSS

$custom: #284cb4;
$custom-light: #787dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#284cb4",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 180
  },
  "hsl": {
    "h": 224.571,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.45605,
    "c": 0.17039,
    "h": 265.5
  },
  "luminance": 0.08915
}

Semantic roles & 50–950 ramp

primary

#284CB4

secondary

#C8B170

accent

#BC41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284CB4

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

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