#284F99#284F99

#284F99 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.1% C 0.129 H 261.7°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#284F99
RGB	rgb(40, 79, 153)
HSL	hsl(219, 59%, 38%)
HSV	hsv(219, 74%, 60%)
CMYK	cmyk(73.9%, 48.4%, 0%, 40%)
CIE-LAB	lab(34.69, 12.91, -44.53)
CIE-LCH	lch(34.69, 46.36, 286.17°)
OKLab	oklab(44.12% -0.0185 -0.1277)
OKLCH	oklch(44.12% 0.129 261.7)
XYZ	xyz(9.4188, 8.3420, 31.2446)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F99 #997228

analogous

#288799 #284F99 #392899

triadic

#284F99 #99284F #4F9928

tetradic

#284F99 #992887 #997228 #289939

square

#284F99 #992887 #997228 #289939

split-complementary

#284F99 #993928 #879928

monochromatic

#0F1D38 #1B3668 #284F99 #3568CA #658CD7

Accessibility & contrast

On white

7.87

#284F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#284F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F99

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F99	#FFFFFF	#000000	##FFFFFF
##284F99	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27579C

Deuteranopia (green-blind)

#084D98

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284f99;
/* rgb */ color: rgb(40, 79, 153);
/* oklch */ color: oklch(44.1% 0.129 261.7);

Tailwind

colors: {
  custom: {
    50: '#717fb7',
    500: '#284f99',
    950: '#000000',
  },
}

SCSS

$custom: #284f99;
$custom-light: #717fb7;
$custom-dark: #000000;

JSON

{
  "hex": "#284f99",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 153
  },
  "hsl": {
    "h": 219.292,
    "s": 58.549,
    "l": 37.843
  },
  "oklch": {
    "l": 0.44121,
    "c": 0.12908,
    "h": 261.7
  },
  "luminance": 0.08343
}

Semantic roles & 50–950 ramp

primary

#284F99

secondary

#BD9D60

accent

#AC46E2

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A11

muted

#7B7C80

Preview Lab

Preview with #284F99

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

Preview Lab → · Contrast checker → · Palette generator →