#284A8A#284A8A

#284A8A is a dark, moderate blue. Relative luminance 0.072; OKLCH L 41.9% C 0.114 H 261.7°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#284A8A
RGB	rgb(40, 74, 138)
HSL	hsl(219, 55%, 35%)
HSV	hsv(219, 71%, 54%)
CMYK	cmyk(71%, 46.4%, 0%, 45.9%)
CIE-LAB	lab(32.22, 10.45, -39.35)
CIE-LCH	lch(32.22, 40.71, 284.88°)
OKLab	oklab(41.91% -0.0164 -0.1126)
OKLCH	oklch(41.91% 0.114 261.7)
XYZ	xyz(7.9097, 7.1828, 25.0094)
Luminance	0.0718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284A8A #8A6828

analogous

#287B8A #284A8A #37288A

triadic

#284A8A #8A284A #4A8A28

tetradic

#284A8A #8A287B #8A6828 #288A37

square

#284A8A #8A287B #8A6828 #288A37

split-complementary

#284A8A #8A3728 #7B8A28

monochromatic

#0C172B #1A315B #284A8A #3663B9 #5D85D0

Accessibility & contrast

On white

8.62

#284A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#284A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284A8A

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284A8A	#FFFFFF	#000000	##FFFFFF
##284A8A	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A518C

Deuteranopia (green-blind)

#174889

Tritanopia (blue-blind)

#005963

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #284a8a;
/* rgb */ color: rgb(40, 74, 138);
/* oklch */ color: oklch(41.9% 0.114 261.7);

Tailwind

colors: {
  custom: {
    50: '#6e7cac',
    500: '#284a8a',
    950: '#000000',
  },
}

SCSS

$custom: #284a8a;
$custom-light: #6e7cac;
$custom-dark: #000000;

JSON

{
  "hex": "#284a8a",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 138
  },
  "hsl": {
    "h": 219.184,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.41909,
    "c": 0.11376,
    "h": 261.7
  },
  "luminance": 0.07184
}

Semantic roles & 50–950 ramp

primary

#284A8A

secondary

#B59559

accent

#AB49DE

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284A8A

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

Preview Lab → · Contrast checker → · Palette generator →