#284AB5#284AB5

#284AB5 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.3% C 0.174 H 266.0°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#284AB5
RGB	rgb(40, 74, 181)
HSL	hsl(226, 64%, 43%)
HSV	hsv(226, 78%, 71%)
CMYK	cmyk(77.9%, 59.1%, 0%, 29%)
CIE-LAB	lab(35.37, 27.04, -60.15)
CIE-LCH	lch(35.37, 65.95, 294.20°)
OKLab	oklab(45.29% -0.0121 -0.1738)
OKLCH	oklch(45.29% 0.174 266)
XYZ	xyz(11.6614, 8.6835, 44.7686)
Luminance	0.0868 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AB5 #B59328

analogous

#2890B5 #284AB5 #4C28B5

triadic

#284AB5 #B5284A #4AB528

tetradic

#284AB5 #B52890 #B59328 #28B54C

square

#284AB5 #B52890 #B59328 #28B54C

split-complementary

#284AB5 #B54C28 #90B528

monochromatic

#122151 #1D3683 #284AB5 #4467D6 #7790E1

Accessibility & contrast

On white

7.67

#284AB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#284AB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AB5

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AB5	#FFFFFF	#000000	##FFFFFF
##284AB5	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB9

Deuteranopia (green-blind)

#004DB3

Tritanopia (blue-blind)

#006578

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284ab5;
/* rgb */ color: rgb(40, 74, 181);
/* oklch */ color: oklch(45.3% 0.174 266.0);

Tailwind

colors: {
  custom: {
    50: '#787ccc',
    500: '#284ab5',
    950: '#000000',
  },
}

SCSS

$custom: #284ab5;
$custom-light: #787ccc;
$custom-dark: #000000;

JSON

{
  "hex": "#284ab5",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 181
  },
  "hsl": {
    "h": 225.532,
    "s": 63.801,
    "l": 43.333
  },
  "oklch": {
    "l": 0.45292,
    "c": 0.1742,
    "h": 266
  },
  "luminance": 0.08685
}

Semantic roles & 50–950 ramp

primary

#284AB5

secondary

#C8B370

accent

#BF41E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284AB5

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

Preview Lab → · Contrast checker → · Palette generator →