#284A8D#284A8D

#284A8D is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.1% C 0.118 H 262.3°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#284A8D
RGB	rgb(40, 74, 141)
HSL	hsl(220, 56%, 35%)
HSV	hsv(220, 72%, 55%)
CMYK	cmyk(71.6%, 47.5%, 0%, 44.7%)
CIE-LAB	lab(32.42, 11.61, -40.87)
CIE-LCH	lch(32.42, 42.49, 285.86°)
OKLab	oklab(42.12% -0.0158 -0.1171)
OKLCH	oklch(42.12% 0.118 262.3)
XYZ	xyz(8.1299, 7.2709, 26.1691)
Luminance	0.0727 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284A8D #8D6B28

analogous

#287C8D #284A8D #38288D

triadic

#284A8D #8D284A #4A8D28

tetradic

#284A8D #8D287C #8D6B28 #288D38

square

#284A8D #8D287C #8D6B28 #288D38

split-complementary

#284A8D #8D3828 #7C8D28

monochromatic

#0D182E #1A315D #284A8D #3663BD #5E85D1

Accessibility & contrast

On white

8.56

#284A8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#284A8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284A8D

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284A8D	#FFFFFF	#000000	##FFFFFF
##284A8D	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275190

Deuteranopia (green-blind)

#12488C

Tritanopia (blue-blind)

#005A64

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #284a8d;
/* rgb */ color: rgb(40, 74, 141);
/* oklch */ color: oklch(42.1% 0.118 262.3);

Tailwind

colors: {
  custom: {
    50: '#6f7caf',
    500: '#284a8d',
    950: '#000000',
  },
}

SCSS

$custom: #284a8d;
$custom-light: #6f7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#284a8d",
  "rgb": {
    "r": 40,
    "g": 74,
    "b": 141
  },
  "hsl": {
    "h": 219.802,
    "s": 55.801,
    "l": 35.49
  },
  "oklch": {
    "l": 0.42123,
    "c": 0.11814,
    "h": 262.3
  },
  "luminance": 0.07272
}

Semantic roles & 50–950 ramp

primary

#284A8D

secondary

#B7985A

accent

#AC49DF

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284A8D

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

Preview Lab → · Contrast checker → · Palette generator →