#284AB3#284AB3

#284AB3 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.1% C 0.172 H 265.9°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#284AB3
RGB	rgb(40, 74, 179)
HSL	hsl(225, 63%, 43%)
HSV	hsv(225, 78%, 70%)
CMYK	cmyk(77.7%, 58.7%, 0%, 29.8%)
CIE-LAB	lab(35.21, 26.28, -59.23)
CIE-LCH	lch(35.21, 64.80, 293.92°)
OKLab	oklab(45.12% -0.0121 -0.1711)
OKLCH	oklch(45.12% 0.172 265.9)
XYZ	xyz(11.4577, 8.6020, 43.6956)
Luminance	0.0860 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284AB3 #B39128

analogous

#288FB3 #284AB3 #4C28B3

triadic

#284AB3 #B3284A #4AB328

tetradic

#284AB3 #B3288F #B39128 #28B34C

square

#284AB3 #B3288F #B39128 #28B34C

split-complementary

#284AB3 #B34C28 #8FB328

monochromatic

#12214F #1D3581 #284AB3 #4367D5 #758FE0

Accessibility & contrast

On white

7.72

#284AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#284AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284AB3

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284AB3	#FFFFFF	#000000	##FFFFFF
##284AB3	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B7

Deuteranopia (green-blind)

#004DB1

Tritanopia (blue-blind)

#006477

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284ab3;
/* rgb */ color: rgb(40, 74, 179);
/* oklch */ color: oklch(45.1% 0.172 265.9);

Tailwind

colors: {
  custom: {
    50: '#787ccb',
    500: '#284ab3',
    950: '#000000',
  },
}

SCSS

$custom: #284ab3;
$custom-light: #787ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#284ab3",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 179
  },
  "hsl": {
    "h": 225.324,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.45122,
    "c": 0.17151,
    "h": 265.9
  },
  "luminance": 0.08603
}

Semantic roles & 50–950 ramp

primary

#284AB3

secondary

#C8B26F

accent

#BE41E6

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284AB3

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

Preview Lab → · Contrast checker → · Palette generator →