#284EB3#284EB3

#284EB3 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.9% C 0.167 H 264.9°. Best body text is #FFFFFF at 7.42:1 contrast (WCAG AA passes).

Color values

HEX	#284EB3
RGB	rgb(40, 78, 179)
HSL	hsl(224, 63%, 43%)
HSV	hsv(224, 78%, 70%)
CMYK	cmyk(77.7%, 56.4%, 0%, 29.8%)
CIE-LAB	lab(36.28, 23.63, -57.49)
CIE-LCH	lch(36.28, 62.16, 292.34°)
OKLab	oklab(45.93% -0.0149 -0.1659)
OKLCH	oklch(45.93% 0.167 264.9)
XYZ	xyz(11.7333, 9.1532, 43.7875)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284EB3 #B38D28

analogous

#2893B3 #284EB3 #4728B3

triadic

#284EB3 #B3284E #4EB328

tetradic

#284EB3 #B32893 #B38D28 #28B347

square

#284EB3 #B32893 #B38D28 #28B347

split-complementary

#284EB3 #B34728 #93B328

monochromatic

#12224F #1D3881 #284EB3 #436BD5 #7592E0

Accessibility & contrast

On white

7.42

#284EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#284EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284EB3

7.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284EB3	#FFFFFF	#000000	##FFFFFF
##284EB3	1.00	7.42	2.83	7.42
#FFFFFF	7.42	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB6

Deuteranopia (green-blind)

#004FB1

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284eb3;
/* rgb */ color: rgb(40, 78, 179);
/* oklch */ color: oklch(45.9% 0.167 264.9);

Tailwind

colors: {
  custom: {
    50: '#777fca',
    500: '#284eb3',
    950: '#000000',
  },
}

SCSS

$custom: #284eb3;
$custom-light: #777fca;
$custom-dark: #000000;

JSON

{
  "hex": "#284eb3",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 179
  },
  "hsl": {
    "h": 223.597,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45926,
    "c": 0.16656,
    "h": 264.9
  },
  "luminance": 0.09155
}

Semantic roles & 50–950 ramp

primary

#284EB3

secondary

#C8AF6F

accent

#B941E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284EB3

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

Preview Lab → · Contrast checker → · Palette generator →