#284FA4#284FA4

#284FA4 is a dark, vivid blue. Relative luminance 0.087; OKLCH L 44.9% C 0.145 H 263.2°. Best body text is #FFFFFF at 7.65:1 contrast (WCAG AA passes).

Color values

HEX	#284FA4
RGB	rgb(40, 79, 164)
HSL	hsl(221, 61%, 40%)
HSV	hsv(221, 76%, 64%)
CMYK	cmyk(75.6%, 51.8%, 0%, 35.7%)
CIE-LAB	lab(35.44, 17.17, -49.92)
CIE-LCH	lch(35.44, 52.79, 288.98°)
OKLab	oklab(44.94% -0.017 -0.1436)
OKLCH	oklch(44.94% 0.145 263.2)
XYZ	xyz(10.3695, 8.7223, 36.2518)
Luminance	0.0872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FA4 #A47D28

analogous

#288DA4 #284FA4 #3F28A4

triadic

#284FA4 #A4284F #4FA428

tetradic

#284FA4 #A4288D #A47D28 #28A43F

square

#284FA4 #A4288D #A47D28 #28A43F

split-complementary

#284FA4 #A43F28 #8DA428

monochromatic

#102042 #1C3773 #284FA4 #3A69CF #6B8FDB

Accessibility & contrast

On white

7.65

#284FA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#284FA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FA4

7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FA4	#FFFFFF	#000000	##FFFFFF
##284FA4	1.00	7.65	2.74	7.65
#FFFFFF	7.65	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1959A7

Deuteranopia (green-blind)

#004EA2

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284fa4;
/* rgb */ color: rgb(40, 79, 164);
/* oklch */ color: oklch(44.9% 0.145 263.2);

Tailwind

colors: {
  custom: {
    50: '#747fc0',
    500: '#284fa4',
    950: '#000000',
  },
}

SCSS

$custom: #284fa4;
$custom-light: #747fc0;
$custom-dark: #000000;

JSON

{
  "hex": "#284fa4",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 164
  },
  "hsl": {
    "h": 221.129,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.44943,
    "c": 0.14461,
    "h": 263.2
  },
  "luminance": 0.08723
}

Semantic roles & 50–950 ramp

primary

#284FA4

secondary

#C1A566

accent

#B244E4

background

#F7F7FB

surface

#EEEEF7

border

#C9C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284FA4

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

Preview Lab → · Contrast checker → · Palette generator →