#284E9F#284E9F

#284E9F is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.3% C 0.139 H 263.1°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#284E9F
RGB	rgb(40, 78, 159)
HSL	hsl(221, 60%, 39%)
HSV	hsv(221, 75%, 62%)
CMYK	cmyk(74.8%, 50.9%, 0%, 37.6%)
CIE-LAB	lab(34.81, 15.90, -47.95)
CIE-LCH	lch(34.81, 50.52, 288.35°)
OKLab	oklab(44.35% -0.0168 -0.1378)
OKLCH	oklch(44.35% 0.139 263.1)
XYZ	xyz(9.8552, 8.4020, 33.8965)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284E9F #9F7928

analogous

#288A9F #284E9F #3D289F

triadic

#284E9F #9F284E #4E9F28

tetradic

#284E9F #9F288A #9F7928 #289F3D

square

#284E9F #9F288A #9F7928 #289F3D

split-complementary

#284E9F #9F3D28 #8A9F28

monochromatic

#0F1E3D #1C366E #284E9F #3767CD #688CD9

Accessibility & contrast

On white

7.83

#284E9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#284E9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284E9F

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284E9F	#FFFFFF	#000000	##FFFFFF
##284E9F	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)

#1D58A2

Deuteranopia (green-blind)

#004D9D

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284e9f;
/* rgb */ color: rgb(40, 78, 159);
/* oklch */ color: oklch(44.3% 0.139 263.1);

Tailwind

colors: {
  custom: {
    50: '#737fbc',
    500: '#284e9f',
    950: '#000000',
  },
}

SCSS

$custom: #284e9f;
$custom-light: #737fbc;
$custom-dark: #000000;

JSON

{
  "hex": "#284e9f",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 159
  },
  "hsl": {
    "h": 220.84,
    "s": 59.799,
    "l": 39.02
  },
  "oklch": {
    "l": 0.44345,
    "c": 0.13885,
    "h": 263.1
  },
  "luminance": 0.08403
}

Semantic roles & 50–950 ramp

primary

#284E9F

secondary

#BFA264

accent

#B045E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284E9F

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

Preview Lab → · Contrast checker → · Palette generator →