#284CA3#284CA3

#284CA3 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.2% C 0.147 H 264.3°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#284CA3
RGB	rgb(40, 76, 163)
HSL	hsl(222, 61%, 40%)
HSV	hsv(222, 75%, 64%)
CMYK	cmyk(75.5%, 53.4%, 0%, 36.1%)
CIE-LAB	lab(34.53, 18.80, -50.81)
CIE-LCH	lch(34.53, 54.17, 290.30°)
OKLab	oklab(44.22% -0.0147 -0.1463)
OKLCH	oklch(44.22% 0.147 264.3)
XYZ	xyz(10.0680, 8.2632, 35.7076)
Luminance	0.0826 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284CA3 #A37F28

analogous

#288AA3 #284CA3 #4228A3

triadic

#284CA3 #A3284C #4CA328

tetradic

#284CA3 #A3288A #A37F28 #28A342

square

#284CA3 #A3288A #A37F28 #28A342

split-complementary

#284CA3 #A34228 #8AA328

monochromatic

#101E41 #1C3572 #284CA3 #3A65CF #6B8CDB

Accessibility & contrast

On white

7.92

#284CA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#284CA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284CA3

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284CA3	#FFFFFF	#000000	##FFFFFF
##284CA3	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E57A6

Deuteranopia (green-blind)

#004CA1

Tritanopia (blue-blind)

#006170

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #284ca3;
/* rgb */ color: rgb(40, 76, 163);
/* oklch */ color: oklch(44.2% 0.147 264.3);

Tailwind

colors: {
  custom: {
    50: '#747dbf',
    500: '#284ca3',
    950: '#000000',
  },
}

SCSS

$custom: #284ca3;
$custom-light: #747dbf;
$custom-dark: #000000;

JSON

{
  "hex": "#284ca3",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 163
  },
  "hsl": {
    "h": 222.439,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.44222,
    "c": 0.147,
    "h": 264.3
  },
  "luminance": 0.08264
}

Semantic roles & 50–950 ramp

primary

#284CA3

secondary

#C1A666

accent

#B544E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #284CA3

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

Preview Lab → · Contrast checker → · Palette generator →