#284AB9#284AB9

#284AB9 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.6% C 0.180 H 266.2°. Best body text is #FFFFFF at 7.58:1 contrast (WCAG AA passes).

Color values

HEX	#284AB9
RGB	rgb(40, 74, 185)
HSL	hsl(226, 64%, 44%)
HSV	hsv(226, 78%, 73%)
CMYK	cmyk(78.4%, 60%, 0%, 27.5%)
CIE-LAB	lab(35.69, 28.55, -61.98)
CIE-LCH	lch(35.69, 68.24, 294.73°)
OKLab	oklab(45.64% -0.012 -0.1791)
OKLCH	oklch(45.64% 0.18 266.2)
XYZ	xyz(12.0777, 8.8501, 46.9612)
Luminance	0.0885 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AB9 #B99728

analogous

#2893B9 #284AB9 #4F28B9

triadic

#284AB9 #B9284A #4AB928

tetradic

#284AB9 #B92893 #B99728 #28B94F

square

#284AB9 #B92893 #B99728 #28B94F

split-complementary

#284AB9 #B94F28 #93B928

monochromatic

#122254 #1D3687 #284AB9 #4769D7 #7992E2

Accessibility & contrast

On white

7.58

#284AB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#284AB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AB9

7.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AB9	#FFFFFF	#000000	##FFFFFF
##284AB9	1.00	7.58	2.77	7.58
#FFFFFF	7.58	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BBD

Deuteranopia (green-blind)

#004DB7

Tritanopia (blue-blind)

#00667A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284ab9;
/* rgb */ color: rgb(40, 74, 185);
/* oklch */ color: oklch(45.6% 0.180 266.2);

Tailwind

colors: {
  custom: {
    50: '#797ccf',
    500: '#284ab9',
    950: '#000000',
  },
}

SCSS

$custom: #284ab9;
$custom-light: #797ccf;
$custom-dark: #000000;

JSON

{
  "hex": "#284ab9",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 185
  },
  "hsl": {
    "h": 225.931,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.45638,
    "c": 0.17954,
    "h": 266.2
  },
  "luminance": 0.08851
}

Semantic roles & 50–950 ramp

primary

#284AB9

secondary

#CAB673

accent

#C040E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #284AB9

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

Preview Lab → · Contrast checker → · Palette generator →