#284F9D#284F9D

#284F9D is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.4% C 0.135 H 262.4°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#284F9D
RGB	rgb(40, 79, 157)
HSL	hsl(220, 59%, 39%)
HSV	hsv(220, 75%, 62%)
CMYK	cmyk(74.5%, 49.7%, 0%, 38.4%)
CIE-LAB	lab(34.96, 14.46, -46.51)
CIE-LCH	lch(34.96, 48.70, 287.27°)
OKLab	oklab(44.42% -0.0179 -0.1336)
OKLCH	oklch(44.42% 0.135 262.4)
XYZ	xyz(9.7547, 8.4763, 33.0138)
Luminance	0.0848 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F9D #9D7628

analogous

#28899D #284F9D #3B289D

triadic

#284F9D #9D284F #4F9D28

tetradic

#284F9D #9D2889 #9D7628 #289D3B

square

#284F9D #9D2889 #9D7628 #289D3B

split-complementary

#284F9D #9D3B28 #899D28

monochromatic

#0F1E3B #1C366C #284F9D #3668CC #678DD8

Accessibility & contrast

On white

7.79

#284F9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#284F9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F9D

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F9D	#FFFFFF	#000000	##FFFFFF
##284F9D	1.00	7.79	2.70	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2358A0

Deuteranopia (green-blind)

#004D9B

Tritanopia (blue-blind)

#00626E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284f9d;
/* rgb */ color: rgb(40, 79, 157);
/* oklch */ color: oklch(44.4% 0.135 262.4);

Tailwind

colors: {
  custom: {
    50: '#727fba',
    500: '#284f9d',
    950: '#000000',
  },
}

SCSS

$custom: #284f9d;
$custom-light: #727fba;
$custom-dark: #000000;

JSON

{
  "hex": "#284f9d",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 157
  },
  "hsl": {
    "h": 220,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.44415,
    "c": 0.13476,
    "h": 262.4
  },
  "luminance": 0.08477
}

Semantic roles & 50–950 ramp

primary

#284F9D

secondary

#BEA062

accent

#AE45E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284F9D

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

Preview Lab → · Contrast checker → · Palette generator →