#284F8A#284F8A

#284F8A is a dark, moderate blue. Relative luminance 0.079; OKLCH L 43.1% C 0.108 H 258.5°. Best body text is #FFFFFF at 8.15:1 contrast (WCAG AA passes).

Color values

HEX	#284F8A
RGB	rgb(40, 79, 138)
HSL	hsl(216, 55%, 35%)
HSV	hsv(216, 71%, 54%)
CMYK	cmyk(71%, 42.8%, 0%, 45.9%)
CIE-LAB	lab(33.73, 7.11, -36.94)
CIE-LCH	lch(33.73, 37.62, 280.89°)
OKLab	oklab(43.07% -0.0214 -0.1054)
OKLCH	oklch(43.07% 0.108 258.5)
XYZ	xyz(8.2568, 7.8772, 25.1251)
Luminance	0.0788 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F8A #8A6328

analogous

#28808A #284F8A #32288A

triadic

#284F8A #8A284F #4F8A28

tetradic

#284F8A #8A2880 #8A6328 #288A32

square

#284F8A #8A2880 #8A6328 #288A32

split-complementary

#284F8A #8A3228 #808A28

monochromatic

#0C192B #1A345B #284F8A #366AB9 #5D8AD0

Accessibility & contrast

On white

8.15

#284F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#284F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F8A

8.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F8A	#FFFFFF	#000000	##FFFFFF
##284F8A	1.00	8.15	2.58	8.15
#FFFFFF	8.15	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33548C

Deuteranopia (green-blind)

#234B89

Tritanopia (blue-blind)

#005D65

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #284f8a;
/* rgb */ color: rgb(40, 79, 138);
/* oklch */ color: oklch(43.1% 0.108 258.5);

Tailwind

colors: {
  custom: {
    50: '#6e7fac',
    500: '#284f8a',
    950: '#000000',
  },
}

SCSS

$custom: #284f8a;
$custom-light: #6e7fac;
$custom-dark: #000000;

JSON

{
  "hex": "#284f8a",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 138
  },
  "hsl": {
    "h": 216.122,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.43072,
    "c": 0.10757,
    "h": 258.5
  },
  "luminance": 0.07878
}

Semantic roles & 50–950 ramp

primary

#284F8A

secondary

#B59059

accent

#A349DE

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080A10

muted

#7B7C7F

Preview Lab

Preview with #284F8A

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

Preview Lab → · Contrast checker → · Palette generator →