#284D99#284D99

#284D99 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.132 H 262.7°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#284D99
RGB	rgb(40, 77, 153)
HSL	hsl(220, 59%, 38%)
HSV	hsv(220, 74%, 60%)
CMYK	cmyk(73.9%, 49.7%, 0%, 40%)
CIE-LAB	lab(34.10, 14.25, -45.47)
CIE-LCH	lch(34.10, 47.65, 287.40°)
OKLab	oklab(43.68% -0.0167 -0.1305)
OKLCH	oklch(43.68% 0.132 262.7)
XYZ	xyz(9.2767, 8.0578, 31.1972)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D99 #997428

analogous

#288599 #284D99 #3B2899

triadic

#284D99 #99284D #4D9928

tetradic

#284D99 #992885 #997428 #28993B

square

#284D99 #992885 #997428 #28993B

split-complementary

#284D99 #993B28 #859928

monochromatic

#0F1C38 #1B3568 #284D99 #3565CA #658AD7

Accessibility & contrast

On white

8.04

#284D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#284D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D99

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D99	#FFFFFF	#000000	##FFFFFF
##284D99	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22569C

Deuteranopia (green-blind)

#004B97

Tritanopia (blue-blind)

#005F6B

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284d99;
/* rgb */ color: rgb(40, 77, 153);
/* oklch */ color: oklch(43.7% 0.132 262.7);

Tailwind

colors: {
  custom: {
    50: '#717eb8',
    500: '#284d99',
    950: '#000000',
  },
}

SCSS

$custom: #284d99;
$custom-light: #717eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#284d99",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 153
  },
  "hsl": {
    "h": 220.354,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.43675,
    "c": 0.1316,
    "h": 262.7
  },
  "luminance": 0.08059
}

Semantic roles & 50–950 ramp

primary

#284D99

secondary

#BD9E60

accent

#AF46E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #284D99

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

Preview Lab → · Contrast checker → · Palette generator →