#284B88#284B88

#284B88 is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.0% C 0.110 H 260.7°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#284B88
RGB	rgb(40, 75, 136)
HSL	hsl(218, 55%, 35%)
HSV	hsv(218, 71%, 53%)
CMYK	cmyk(70.6%, 44.9%, 0%, 46.7%)
CIE-LAB	lab(32.39, 9.01, -37.84)
CIE-LCH	lch(32.39, 38.90, 283.39°)
OKLab	oklab(42% -0.0177 -0.1081)
OKLCH	oklch(42% 0.11 260.7)
XYZ	xyz(7.8335, 7.2600, 24.2763)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284B88 #886528

analogous

#287B88 #284B88 #352888

triadic

#284B88 #88284B #4B8828

tetradic

#284B88 #88287B #886528 #288835

square

#284B88 #88287B #886528 #288835

split-complementary

#284B88 #883528 #7B8828

monochromatic

#0C1729 #1A3159 #284B88 #3665B7 #5B86CF

Accessibility & contrast

On white

8.56

#284B88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#284B88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284B88

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284B88	#FFFFFF	#000000	##FFFFFF
##284B88	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)

#2E518A

Deuteranopia (green-blind)

#1D4887

Tritanopia (blue-blind)

#005963

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #284b88;
/* rgb */ color: rgb(40, 75, 136);
/* oklch */ color: oklch(42.0% 0.110 260.7);

Tailwind

colors: {
  custom: {
    50: '#6e7cab',
    500: '#284b88',
    950: '#000000',
  },
}

SCSS

$custom: #284b88;
$custom-light: #6e7cab;
$custom-dark: #000000;

JSON

{
  "hex": "#284b88",
  "rgb": {
    "r": 40,
    "g": 75,
    "b": 136
  },
  "hsl": {
    "h": 218.125,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42,
    "c": 0.10959,
    "h": 260.7
  },
  "luminance": 0.07261
}

Semantic roles & 50–950 ramp

primary

#284B88

secondary

#B49258

accent

#A84ADE

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284B88

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

Preview Lab → · Contrast checker → · Palette generator →