#284DB4#284DB4

#284DB4 is a mid, vivid blue. Relative luminance 0.091; OKLCH L 45.8% C 0.169 H 265.2°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#284DB4
RGB	rgb(40, 77, 180)
HSL	hsl(224, 64%, 43%)
HSV	hsv(224, 78%, 71%)
CMYK	cmyk(77.8%, 57.2%, 0%, 29.4%)
CIE-LAB	lab(36.09, 24.67, -58.39)
CIE-LCH	lch(36.09, 63.39, 292.90°)
OKLab	oklab(45.81% -0.0141 -0.1686)
OKLCH	oklch(45.81% 0.169 265.2)
XYZ	xyz(11.7643, 9.0528, 44.2985)
Luminance	0.0905 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DB4 #B48F28

analogous

#2893B4 #284DB4 #4928B4

triadic

#284DB4 #B4284D #4DB428

tetradic

#284DB4 #B42893 #B48F28 #28B449

square

#284DB4 #B42893 #B48F28 #28B449

split-complementary

#284DB4 #B44928 #93B428

monochromatic

#122250 #1D3882 #284DB4 #446AD5 #7692E1

Accessibility & contrast

On white

7.47

#284DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#284DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DB4

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DB4	#FFFFFF	#000000	##FFFFFF
##284DB4	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB8

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284db4;
/* rgb */ color: rgb(40, 77, 180);
/* oklch */ color: oklch(45.8% 0.169 265.2);

Tailwind

colors: {
  custom: {
    50: '#787ecb',
    500: '#284db4',
    950: '#000000',
  },
}

SCSS

$custom: #284db4;
$custom-light: #787ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#284db4",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 180
  },
  "hsl": {
    "h": 224.143,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.45806,
    "c": 0.16915,
    "h": 265.2
  },
  "luminance": 0.09054
}

Semantic roles & 50–950 ramp

primary

#284DB4

secondary

#C8B170

accent

#BB41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284DB4

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

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