#284D8A#284D8A

#284D8A is a dark, moderate blue. Relative luminance 0.076; OKLCH L 42.6% C 0.110 H 259.9°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#284D8A
RGB	rgb(40, 77, 138)
HSL	hsl(217, 55%, 35%)
HSV	hsv(217, 71%, 54%)
CMYK	cmyk(71%, 44.2%, 0%, 45.9%)
CIE-LAB	lab(33.12, 8.44, -37.90)
CIE-LCH	lch(33.12, 38.83, 282.55°)
OKLab	oklab(42.6% -0.0194 -0.1083)
OKLCH	oklch(42.6% 0.11 259.9)
XYZ	xyz(8.1147, 7.5930, 25.0778)
Luminance	0.0759 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D8A #8A6528

analogous

#287E8A #284D8A #34288A

triadic

#284D8A #8A284D #4D8A28

tetradic

#284D8A #8A287E #8A6528 #288A34

square

#284D8A #8A287E #8A6528 #288A34

split-complementary

#284D8A #8A3428 #7E8A28

monochromatic

#0C182B #1A335B #284D8A #3667B9 #5D88D0

Accessibility & contrast

On white

8.34

#284D8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#284D8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D8A

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D8A	#FFFFFF	#000000	##FFFFFF
##284D8A	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#30538C

Deuteranopia (green-blind)

#1F4A89

Tritanopia (blue-blind)

#005B64

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #284d8a;
/* rgb */ color: rgb(40, 77, 138);
/* oklch */ color: oklch(42.6% 0.110 259.9);

Tailwind

colors: {
  custom: {
    50: '#6e7eac',
    500: '#284d8a',
    950: '#000000',
  },
}

SCSS

$custom: #284d8a;
$custom-light: #6e7eac;
$custom-dark: #000000;

JSON

{
  "hex": "#284d8a",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 138
  },
  "hsl": {
    "h": 217.347,
    "s": 55.056,
    "l": 34.902
  },
  "oklch": {
    "l": 0.42603,
    "c": 0.11002,
    "h": 259.9
  },
  "luminance": 0.07594
}

Semantic roles & 50–950 ramp

primary

#284D8A

secondary

#B59259

accent

#A649DE

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284D8A

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

Preview Lab → · Contrast checker → · Palette generator →