#284FB1#284FB1

#284FB1 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.0% C 0.163 H 264.4°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#284FB1
RGB	rgb(40, 79, 177)
HSL	hsl(223, 63%, 43%)
HSV	hsv(223, 77%, 69%)
CMYK	cmyk(77.4%, 55.4%, 0%, 30.6%)
CIE-LAB	lab(36.40, 22.19, -56.11)
CIE-LCH	lch(36.40, 60.34, 291.58°)
OKLab	oklab(45.97% -0.0158 -0.1618)
OKLCH	oklch(45.97% 0.163 264.4)
XYZ	xyz(11.6041, 9.2161, 42.7538)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FB1 #B18A28

analogous

#2893B1 #284FB1 #4628B1

triadic

#284FB1 #B1284F #4FB128

tetradic

#284FB1 #B12893 #B18A28 #28B146

square

#284FB1 #B12893 #B18A28 #28B146

split-complementary

#284FB1 #B14628 #93B128

monochromatic

#11224D #1D397F #284FB1 #426CD4 #7493E0

Accessibility & contrast

On white

7.39

#284FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#284FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FB1

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FB1	#FFFFFF	#000000	##FFFFFF
##284FB1	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB4

Deuteranopia (green-blind)

#0050AF

Tritanopia (blue-blind)

#006778

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #284fb1;
/* rgb */ color: rgb(40, 79, 177);
/* oklch */ color: oklch(46.0% 0.163 264.4);

Tailwind

colors: {
  custom: {
    50: '#777fc9',
    500: '#284fb1',
    950: '#000000',
  },
}

SCSS

$custom: #284fb1;
$custom-light: #777fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#284fb1",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 177
  },
  "hsl": {
    "h": 222.92,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.45968,
    "c": 0.1626,
    "h": 264.4
  },
  "luminance": 0.09217
}

Semantic roles & 50–950 ramp

primary

#284FB1

secondary

#C7AE6E

accent

#B742E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284FB1

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

Preview Lab → · Contrast checker → · Palette generator →