#284D9A#284D9A

#284D9A is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.133 H 262.8°. Best body text is #FFFFFF at 8.02:1 contrast (WCAG AA passes).

Color values

HEX	#284D9A
RGB	rgb(40, 77, 154)
HSL	hsl(221, 59%, 38%)
HSV	hsv(221, 74%, 60%)
CMYK	cmyk(74%, 50%, 0%, 39.6%)
CIE-LAB	lab(34.17, 14.64, -45.96)
CIE-LCH	lch(34.17, 48.23, 287.66°)
OKLab	oklab(43.75% -0.0166 -0.132)
OKLCH	oklch(43.75% 0.133 262.8)
XYZ	xyz(9.3596, 8.0910, 31.6340)
Luminance	0.0809 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284D9A #9A7528

analogous

#28869A #284D9A #3C289A

triadic

#284D9A #9A284D #4D9A28

tetradic

#284D9A #9A2886 #9A7528 #289A3C

square

#284D9A #9A2886 #9A7528 #289A3C

split-complementary

#284D9A #9A3C28 #869A28

monochromatic

#0F1C39 #1B3569 #284D9A #3565CA #658AD7

Accessibility & contrast

On white

8.02

#284D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#284D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284D9A

8.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284D9A	#FFFFFF	#000000	##FFFFFF
##284D9A	1.00	8.02	2.62	8.02
#FFFFFF	8.02	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21569D

Deuteranopia (green-blind)

#004B98

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284d9a;
/* rgb */ color: rgb(40, 77, 154);
/* oklch */ color: oklch(43.7% 0.133 262.8);

Tailwind

colors: {
  custom: {
    50: '#727eb8',
    500: '#284d9a',
    950: '#000000',
  },
}

SCSS

$custom: #284d9a;
$custom-light: #727eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#284d9a",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 154
  },
  "hsl": {
    "h": 220.526,
    "s": 58.763,
    "l": 38.039
  },
  "oklch": {
    "l": 0.43749,
    "c": 0.13303,
    "h": 262.8
  },
  "luminance": 0.08092
}

Semantic roles & 50–950 ramp

primary

#284D9A

secondary

#BD9F61

accent

#AF46E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090911

muted

#7B7B80

Preview Lab

Preview with #284D9A

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

Preview Lab → · Contrast checker → · Palette generator →