#284CB1#284CB1

#284CB1 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.4% C 0.166 H 265.3°. Best body text is #FFFFFF at 7.61:1 contrast (WCAG AA passes).

Color values

HEX	#284CB1
RGB	rgb(40, 76, 177)
HSL	hsl(224, 63%, 43%)
HSV	hsv(224, 77%, 69%)
CMYK	cmyk(77.4%, 57.1%, 0%, 30.6%)
CIE-LAB	lab(35.58, 24.19, -57.44)
CIE-LCH	lch(35.58, 62.32, 292.84°)
OKLab	oklab(45.35% -0.0136 -0.1658)
OKLCH	oklch(45.35% 0.166 265.3)
XYZ	xyz(11.3925, 8.7930, 42.6832)
Luminance	0.0879 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CB1 #B18D28

analogous

#2890B1 #284CB1 #4928B1

triadic

#284CB1 #B1284C #4CB128

tetradic

#284CB1 #B12890 #B18D28 #28B149

square

#284CB1 #B12890 #B18D28 #28B149

split-complementary

#284CB1 #B14928 #90B128

monochromatic

#11214D #1D377F #284CB1 #4268D4 #7490E0

Accessibility & contrast

On white

7.61

#284CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#284CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CB1

7.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CB1	#FFFFFF	#000000	##FFFFFF
##284CB1	1.00	7.61	2.76	7.61
#FFFFFF	7.61	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB4

Deuteranopia (green-blind)

#004EAF

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #284cb1;
/* rgb */ color: rgb(40, 76, 177);
/* oklch */ color: oklch(45.4% 0.166 265.3);

Tailwind

colors: {
  custom: {
    50: '#777dc9',
    500: '#284cb1',
    950: '#000000',
  },
}

SCSS

$custom: #284cb1;
$custom-light: #777dc9;
$custom-dark: #000000;

JSON

{
  "hex": "#284cb1",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 177
  },
  "hsl": {
    "h": 224.234,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.45354,
    "c": 0.16633,
    "h": 265.3
  },
  "luminance": 0.08794
}

Semantic roles & 50–950 ramp

primary

#284CB1

secondary

#C7AF6E

accent

#BB42E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #284CB1

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

Preview Lab → · Contrast checker → · Palette generator →