#284D88#284D88

#284D88 is a dark, moderate blue. Relative luminance 0.075; OKLCH L 42.5% C 0.107 H 259.4°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#284D88
RGB	rgb(40, 77, 136)
HSL	hsl(217, 55%, 35%)
HSV	hsv(217, 71%, 53%)
CMYK	cmyk(70.6%, 43.4%, 0%, 46.7%)
CIE-LAB	lab(33.00, 7.67, -36.87)
CIE-LCH	lch(33.00, 37.66, 281.75°)
OKLab	oklab(42.47% -0.0198 -0.1053)
OKLCH	oklch(42.47% 0.107 259.4)
XYZ	xyz(7.9713, 7.5356, 24.3222)
Luminance	0.0754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D88 #886328

analogous

#287D88 #284D88 #332888

triadic

#284D88 #88284D #4D8828

tetradic

#284D88 #88287D #886328 #288833

square

#284D88 #88287D #886328 #288833

split-complementary

#284D88 #883328 #7D8828

monochromatic

#0C1729 #1A3259 #284D88 #3668B7 #5B88CF

Accessibility & contrast

On white

8.38

#284D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#284D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D88

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D88	#FFFFFF	#000000	##FFFFFF
##284D88	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#31528A

Deuteranopia (green-blind)

#214987

Tritanopia (blue-blind)

#005B64

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #284d88;
/* rgb */ color: rgb(40, 77, 136);
/* oklch */ color: oklch(42.5% 0.107 259.4);

Tailwind

colors: {
  custom: {
    50: '#6e7eab',
    500: '#284d88',
    950: '#000000',
  },
}

SCSS

$custom: #284d88;
$custom-light: #6e7eab;
$custom-dark: #000000;

JSON

{
  "hex": "#284d88",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 136
  },
  "hsl": {
    "h": 216.875,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42467,
    "c": 0.10711,
    "h": 259.4
  },
  "luminance": 0.07536
}

Semantic roles & 50–950 ramp

primary

#284D88

secondary

#B49058

accent

#A54ADE

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284D88

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

Preview Lab → · Contrast checker → · Palette generator →