#284FA1#284FA1

#284FA1 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.7% C 0.140 H 262.9°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#284FA1
RGB	rgb(40, 79, 161)
HSL	hsl(221, 60%, 39%)
HSV	hsv(221, 75%, 63%)
CMYK	cmyk(75.2%, 50.9%, 0%, 36.9%)
CIE-LAB	lab(35.23, 16.01, -48.47)
CIE-LCH	lch(35.23, 51.04, 288.28°)
OKLab	oklab(44.72% -0.0174 -0.1393)
OKLCH	oklch(44.72% 0.14 262.9)
XYZ	xyz(10.1018, 8.6152, 34.8418)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284FA1 #A17A28

analogous

#288CA1 #284FA1 #3E28A1

triadic

#284FA1 #A1284F #4FA128

tetradic

#284FA1 #A1288C #A17A28 #28A13E

square

#284FA1 #A1288C #A17A28 #28A13E

split-complementary

#284FA1 #A13E28 #8CA128

monochromatic

#101F3F #1C3770 #284FA1 #3969CE #6A8EDA

Accessibility & contrast

On white

7.71

#284FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#284FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284FA1

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284FA1	#FFFFFF	#000000	##FFFFFF
##284FA1	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D59A4

Deuteranopia (green-blind)

#004E9F

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #284fa1;
/* rgb */ color: rgb(40, 79, 161);
/* oklch */ color: oklch(44.7% 0.140 262.9);

Tailwind

colors: {
  custom: {
    50: '#737fbd',
    500: '#284fa1',
    950: '#000000',
  },
}

SCSS

$custom: #284fa1;
$custom-light: #737fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#284fa1",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 161
  },
  "hsl": {
    "h": 220.661,
    "s": 60.199,
    "l": 39.412
  },
  "oklch": {
    "l": 0.44715,
    "c": 0.1404,
    "h": 262.9
  },
  "luminance": 0.08616
}

Semantic roles & 50–950 ramp

primary

#284FA1

secondary

#C0A365

accent

#B044E3

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #284FA1

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

Preview Lab → · Contrast checker → · Palette generator →