#284DA3#284DA3

#284DA3 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.4% C 0.146 H 263.9°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#284DA3
RGB	rgb(40, 77, 163)
HSL	hsl(222, 61%, 40%)
HSV	hsv(222, 75%, 64%)
CMYK	cmyk(75.5%, 52.8%, 0%, 36.1%)
CIE-LAB	lab(34.81, 18.13, -50.35)
CIE-LCH	lch(34.81, 53.52, 289.80°)
OKLab	oklab(44.44% -0.0155 -0.1449)
OKLCH	oklch(44.44% 0.146 263.9)
XYZ	xyz(10.1375, 8.4021, 35.7307)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284DA3 #A37E28

analogous

#288BA3 #284DA3 #4028A3

triadic

#284DA3 #A3284D #4DA328

tetradic

#284DA3 #A3288B #A37E28 #28A340

square

#284DA3 #A3288B #A37E28 #28A340

split-complementary

#284DA3 #A34028 #8BA328

monochromatic

#101F41 #1C3672 #284DA3 #3A66CF #6B8CDB

Accessibility & contrast

On white

7.83

#284DA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#284DA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284DA3

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284DA3	#FFFFFF	#000000	##FFFFFF
##284DA3	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)

#1358A6

Deuteranopia (green-blind)

#004CA1

Tritanopia (blue-blind)

#006270

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #284da3;
/* rgb */ color: rgb(40, 77, 163);
/* oklch */ color: oklch(44.4% 0.146 263.9);

Tailwind

colors: {
  custom: {
    50: '#747ebf',
    500: '#284da3',
    950: '#000000',
  },
}

SCSS

$custom: #284da3;
$custom-light: #747ebf;
$custom-dark: #000000;

JSON

{
  "hex": "#284da3",
  "rgb": {
    "r": 40,
    "g": 77,
    "b": 163
  },
  "hsl": {
    "h": 221.951,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44436,
    "c": 0.14573,
    "h": 263.9
  },
  "luminance": 0.08403
}

Semantic roles & 50–950 ramp

primary

#284DA3

secondary

#C1A666

accent

#B444E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284DA3

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

Preview Lab → · Contrast checker → · Palette generator →