#284DB1#284DB1

#284DB1 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.165 H 265.0°. Best body text is #FFFFFF at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#284DB1
RGB	rgb(40, 77, 177)
HSL	hsl(224, 63%, 43%)
HSV	hsv(224, 77%, 69%)
CMYK	cmyk(77.4%, 56.5%, 0%, 30.6%)
CIE-LAB	lab(35.85, 23.52, -57.00)
CIE-LCH	lch(35.85, 61.66, 292.43°)
OKLab	oklab(45.56% -0.0143 -0.1645)
OKLCH	oklch(45.56% 0.165 265)
XYZ	xyz(11.4620, 8.9319, 42.7064)
Luminance	0.0893 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DB1 #B18C28

analogous

#2891B1 #284DB1 #4828B1

triadic

#284DB1 #B1284D #4DB128

tetradic

#284DB1 #B12891 #B18C28 #28B148

square

#284DB1 #B12891 #B18C28 #28B148

split-complementary

#284DB1 #B14828 #91B128

monochromatic

#11224D #1D377F #284DB1 #4269D4 #7491E0

Accessibility & contrast

On white

7.54

#284DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#284DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DB1

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DB1	#FFFFFF	#000000	##FFFFFF
##284DB1	1.00	7.54	2.79	7.54
#FFFFFF	7.54	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB4

Deuteranopia (green-blind)

#004EAF

Tritanopia (blue-blind)

#006677

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284db1;
/* rgb */ color: rgb(40, 77, 177);
/* oklch */ color: oklch(45.6% 0.165 265.0);

Tailwind

colors: {
  custom: {
    50: '#777ec9',
    500: '#284db1',
    950: '#000000',
  },
}

SCSS

$custom: #284db1;
$custom-light: #777ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#284db1",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 177
  },
  "hsl": {
    "h": 223.796,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.45557,
    "c": 0.16508,
    "h": 265
  },
  "luminance": 0.08933
}

Semantic roles & 50–950 ramp

primary

#284DB1

secondary

#C7AF6E

accent

#BA42E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284DB1

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

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