#284E9D#284E9D

#284E9D is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.136 H 262.8°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#284E9D
RGB	rgb(40, 78, 157)
HSL	hsl(221, 59%, 39%)
HSV	hsv(221, 75%, 62%)
CMYK	cmyk(74.5%, 50.3%, 0%, 38.4%)
CIE-LAB	lab(34.67, 15.13, -46.97)
CIE-LCH	lch(34.67, 49.35, 287.85°)
OKLab	oklab(44.19% -0.0171 -0.1349)
OKLCH	oklch(44.19% 0.136 262.8)
XYZ	xyz(9.6831, 8.3332, 32.9899)
Luminance	0.0833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284E9D #9D7728

analogous

#28889D #284E9D #3C289D

triadic

#284E9D #9D284E #4E9D28

tetradic

#284E9D #9D2888 #9D7728 #289D3C

square

#284E9D #9D2888 #9D7728 #289D3C

split-complementary

#284E9D #9D3C28 #889D28

monochromatic

#0F1E3B #1C366C #284E9D #3667CC #678CD8

Accessibility & contrast

On white

7.87

#284E9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#284E9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284E9D

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284E9D	#FFFFFF	#000000	##FFFFFF
##284E9D	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)

#2057A0

Deuteranopia (green-blind)

#004C9B

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284e9d;
/* rgb */ color: rgb(40, 78, 157);
/* oklch */ color: oklch(44.2% 0.136 262.8);

Tailwind

colors: {
  custom: {
    50: '#727fba',
    500: '#284e9d',
    950: '#000000',
  },
}

SCSS

$custom: #284e9d;
$custom-light: #727fba;
$custom-dark: #000000;

JSON

{
  "hex": "#284e9d",
  "rgb": {
    "r": 40,
    "g": 78,
    "b": 157
  },
  "hsl": {
    "h": 220.513,
    "s": 59.391,
    "l": 38.627
  },
  "oklch": {
    "l": 0.44194,
    "c": 0.13602,
    "h": 262.8
  },
  "luminance": 0.08334
}

Semantic roles & 50–950 ramp

primary

#284E9D

secondary

#BEA162

accent

#AF45E3

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284E9D

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

Preview Lab → · Contrast checker → · Palette generator →