#284BB3#284BB3

#284BB3 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.3% C 0.170 H 265.7°. Best body text is #FFFFFF at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#284BB3
RGB	rgb(40, 75, 179)
HSL	hsl(225, 63%, 43%)
HSV	hsv(225, 78%, 70%)
CMYK	cmyk(77.7%, 58.1%, 0%, 29.8%)
CIE-LAB	lab(35.47, 25.62, -58.80)
CIE-LCH	lch(35.47, 64.14, 293.54°)
OKLab	oklab(45.32% -0.0128 -0.1698)
OKLCH	oklch(45.32% 0.17 265.7)
XYZ	xyz(11.5250, 8.7366, 43.7180)
Luminance	0.0874 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284BB3 #B39028

analogous

#2890B3 #284BB3 #4A28B3

triadic

#284BB3 #B3284B #4BB328

tetradic

#284BB3 #B32890 #B39028 #28B34A

square

#284BB3 #B32890 #B39028 #28B34A

split-complementary

#284BB3 #B34A28 #90B328

monochromatic

#12214F #1D3681 #284BB3 #4368D5 #7590E0

Accessibility & contrast

On white

7.64

#284BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.75

#284BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284BB3

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284BB3	#FFFFFF	#000000	##FFFFFF
##284BB3	1.00	7.64	2.75	7.64
#FFFFFF	7.64	1.00	21.00	1.00
#000000	2.75	21.00	1.00	21.00
##FFFFFF	7.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB7

Deuteranopia (green-blind)

#004DB1

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284bb3;
/* rgb */ color: rgb(40, 75, 179);
/* oklch */ color: oklch(45.3% 0.170 265.7);

Tailwind

colors: {
  custom: {
    50: '#787ccb',
    500: '#284bb3',
    950: '#000000',
  },
}

SCSS

$custom: #284bb3;
$custom-light: #787ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#284bb3",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 179
  },
  "hsl": {
    "h": 224.892,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45321,
    "c": 0.17027,
    "h": 265.7
  },
  "luminance": 0.08738
}

Semantic roles & 50–950 ramp

primary

#284BB3

secondary

#C8B16F

accent

#BD41E6

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284BB3

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

Preview Lab → · Contrast checker → · Palette generator →