#284F9B#284F9B

#284F9B is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.3% C 0.132 H 262.1°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#284F9B
RGB	rgb(40, 79, 155)
HSL	hsl(220, 59%, 38%)
HSV	hsv(220, 74%, 61%)
CMYK	cmyk(74.2%, 49%, 0%, 39.2%)
CIE-LAB	lab(34.82, 13.68, -45.52)
CIE-LCH	lch(34.82, 47.53, 286.73°)
OKLab	oklab(44.27% -0.0182 -0.1307)
OKLCH	oklch(44.27% 0.132 262.1)
XYZ	xyz(9.5853, 8.4086, 32.1218)
Luminance	0.0841 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F9B #9B7428

analogous

#28889B #284F9B #3A289B

triadic

#284F9B #9B284F #4F9B28

tetradic

#284F9B #9B2888 #9B7428 #289B3A

square

#284F9B #9B2888 #9B7428 #289B3A

split-complementary

#284F9B #9B3A28 #889B28

monochromatic

#0F1D3A #1B366A #284F9B #3568CB #668CD7

Accessibility & contrast

On white

7.83

#284F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#284F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F9B

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F9B	#FFFFFF	#000000	##FFFFFF
##284F9B	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25579E

Deuteranopia (green-blind)

#014D99

Tritanopia (blue-blind)

#00616D

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284f9b;
/* rgb */ color: rgb(40, 79, 155);
/* oklch */ color: oklch(44.3% 0.132 262.1);

Tailwind

colors: {
  custom: {
    50: '#727fb9',
    500: '#284f9b',
    950: '#000000',
  },
}

SCSS

$custom: #284f9b;
$custom-light: #727fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#284f9b",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 155
  },
  "hsl": {
    "h": 219.652,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.44267,
    "c": 0.13192,
    "h": 262.1
  },
  "luminance": 0.0841
}

Semantic roles & 50–950 ramp

primary

#284F9B

secondary

#BD9E61

accent

#AD46E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #284F9B

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

Preview Lab → · Contrast checker → · Palette generator →