#284BB9#284BB9

#284BB9 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.8% C 0.178 H 265.9°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#284BB9
RGB	rgb(40, 75, 185)
HSL	hsl(226, 64%, 44%)
HSV	hsv(226, 78%, 73%)
CMYK	cmyk(78.4%, 59.5%, 0%, 27.5%)
CIE-LAB	lab(35.95, 27.90, -61.56)
CIE-LCH	lch(35.95, 67.58, 294.38°)
OKLab	oklab(45.83% -0.0126 -0.1779)
OKLCH	oklch(45.83% 0.178 265.9)
XYZ	xyz(12.1450, 8.9847, 46.9837)
Luminance	0.0899 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284BB9 #B99628

analogous

#2894B9 #284BB9 #4E28B9

triadic

#284BB9 #B9284B #4BB928

tetradic

#284BB9 #B92894 #B99628 #28B94E

square

#284BB9 #B92894 #B99628 #28B94E

split-complementary

#284BB9 #B94E28 #94B928

monochromatic

#122254 #1D3787 #284BB9 #476AD7 #7993E2

Accessibility & contrast

On white

7.51

#284BB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#284BB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284BB9

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284BB9	#FFFFFF	#000000	##FFFFFF
##284BB9	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CBD

Deuteranopia (green-blind)

#004EB7

Tritanopia (blue-blind)

#00677A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #284bb9;
/* rgb */ color: rgb(40, 75, 185);
/* oklch */ color: oklch(45.8% 0.178 265.9);

Tailwind

colors: {
  custom: {
    50: '#797ccf',
    500: '#284bb9',
    950: '#000000',
  },
}

SCSS

$custom: #284bb9;
$custom-light: #797ccf;
$custom-dark: #000000;

JSON

{
  "hex": "#284bb9",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 185
  },
  "hsl": {
    "h": 225.517,
    "s": 64.444,
    "l": 44.118
  },
  "oklch": {
    "l": 0.45832,
    "c": 0.17833,
    "h": 265.9
  },
  "luminance": 0.08986
}

Semantic roles & 50–950 ramp

primary

#284BB9

secondary

#CAB573

accent

#BF40E7

background

#F8F7FC

surface

#EFEEF9

border

#CAC9D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #284BB9

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

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