#284D9F#284D9F

#284D9F is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.1% C 0.140 H 263.5°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#284D9F
RGB	rgb(40, 77, 159)
HSL	hsl(221, 60%, 39%)
HSV	hsv(221, 75%, 62%)
CMYK	cmyk(74.8%, 51.6%, 0%, 37.6%)
CIE-LAB	lab(34.52, 16.57, -48.41)
CIE-LCH	lch(34.52, 51.17, 288.90°)
OKLab	oklab(44.13% -0.0159 -0.1392)
OKLCH	oklch(44.13% 0.14 263.5)
XYZ	xyz(9.7847, 8.2610, 33.8730)
Luminance	0.0826 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D9F #9F7A28

analogous

#28899F #284D9F #3F289F

triadic

#284D9F #9F284D #4D9F28

tetradic

#284D9F #9F2889 #9F7A28 #289F3F

square

#284D9F #9F2889 #9F7A28 #289F3F

split-complementary

#284D9F #9F3F28 #899F28

monochromatic

#0F1E3D #1C356E #284D9F #3766CD #688BD9

Accessibility & contrast

On white

7.92

#284D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#284D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D9F

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D9F	#FFFFFF	#000000	##FFFFFF
##284D9F	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A57A2

Deuteranopia (green-blind)

#004C9D

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284d9f;
/* rgb */ color: rgb(40, 77, 159);
/* oklch */ color: oklch(44.1% 0.140 263.5);

Tailwind

colors: {
  custom: {
    50: '#737ebc',
    500: '#284d9f',
    950: '#000000',
  },
}

SCSS

$custom: #284d9f;
$custom-light: #737ebc;
$custom-dark: #000000;

JSON

{
  "hex": "#284d9f",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 159
  },
  "hsl": {
    "h": 221.345,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44127,
    "c": 0.14012,
    "h": 263.5
  },
  "luminance": 0.08262
}

Semantic roles & 50–950 ramp

primary

#284D9F

secondary

#BFA364

accent

#B245E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284D9F

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

Preview Lab → · Contrast checker → · Palette generator →