#284FB0#284FB0

#284FB0 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.9% C 0.161 H 264.4°. Best body text is #FFFFFF at 7.41:1 contrast (WCAG AA passes).

Color values

HEX	#284FB0
RGB	rgb(40, 79, 176)
HSL	hsl(223, 63%, 42%)
HSV	hsv(223, 77%, 69%)
CMYK	cmyk(77.3%, 55.1%, 0%, 31%)
CIE-LAB	lab(36.32, 21.81, -55.64)
CIE-LCH	lch(36.32, 59.77, 291.40°)
OKLab	oklab(45.89% -0.0158 -0.1604)
OKLCH	oklch(45.89% 0.161 264.4)
XYZ	xyz(11.5047, 9.1764, 42.2308)
Luminance	0.0918 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FB0 #B08928

analogous

#2893B0 #284FB0 #4528B0

triadic

#284FB0 #B0284F #4FB028

tetradic

#284FB0 #B02893 #B08928 #28B045

square

#284FB0 #B02893 #B08928 #28B045

split-complementary

#284FB0 #B04528 #93B028

monochromatic

#11224C #1D397E #284FB0 #416BD4 #7392DF

Accessibility & contrast

On white

7.41

#284FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#284FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FB0

7.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FB0	#FFFFFF	#000000	##FFFFFF
##284FB0	1.00	7.41	2.84	7.41
#FFFFFF	7.41	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB3

Deuteranopia (green-blind)

#004FAE

Tritanopia (blue-blind)

#006777

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284fb0;
/* rgb */ color: rgb(40, 79, 176);
/* oklch */ color: oklch(45.9% 0.161 264.4);

Tailwind

colors: {
  custom: {
    50: '#777fc8',
    500: '#284fb0',
    950: '#000000',
  },
}

SCSS

$custom: #284fb0;
$custom-light: #777fc8;
$custom-dark: #000000;

JSON

{
  "hex": "#284fb0",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 176
  },
  "hsl": {
    "h": 222.794,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.45887,
    "c": 0.16123,
    "h": 264.4
  },
  "luminance": 0.09178
}

Semantic roles & 50–950 ramp

primary

#284FB0

secondary

#C6AD6D

accent

#B742E6

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #284FB0

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

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