#3579DC#3579DC

#3579DC is a mid, vivid blue. Relative luminance 0.196; OKLCH L 58.5% C 0.166 H 258.2°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#3579DC
RGB	rgb(53, 121, 220)
HSL	hsl(216, 70%, 54%)
HSV	hsv(216, 76%, 86%)
CMYK	cmyk(75.9%, 45%, 0%, 13.7%)
CIE-LAB	lab(51.38, 12.90, -56.74)
CIE-LCH	lch(51.38, 58.19, 282.81°)
OKLab	oklab(58.47% -0.0341 -0.1627)
OKLCH	oklch(58.47% 0.166 258.2)
XYZ	xyz(21.2191, 19.5965, 70.3604)
Luminance	0.1960 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579DC #DC9835

analogous

#35CCDC #3579DC #4435DC

triadic

#3579DC #DC3579 #79DC35

tetradic

#3579DC #DC35CC #DC9835 #35DC44

square

#3579DC #DC35CC #DC9835 #35DC44

split-complementary

#3579DC #DC4435 #CCDC35

monochromatic

#164180 #1F5CB5 #3579DC #699CE5 #9DBEEE

Accessibility & contrast

On white

4.27

#3579DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#3579DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579DC

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579DC	#FFFFFF	#000000	##000000
##3579DC	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4583E0

Deuteranopia (green-blind)

#2073DA

Tritanopia (blue-blind)

#0090A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3579dc;
/* rgb */ color: rgb(53, 121, 220);
/* oklch */ color: oklch(58.5% 0.166 258.2);

Tailwind

colors: {
  custom: {
    50: '#839fe7',
    500: '#3579dc',
    950: '#000000',
  },
}

SCSS

$custom: #3579dc;
$custom-light: #839fe7;
$custom-dark: #000000;

JSON

{
  "hex": "#3579dc",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 220
  },
  "hsl": {
    "h": 215.569,
    "s": 70.464,
    "l": 53.529
  },
  "oklch": {
    "l": 0.58468,
    "c": 0.16623,
    "h": 258.2
  },
  "luminance": 0.19599
}

Semantic roles & 50–950 ramp

primary

#3579DC

secondary

#DABD93

accent

#A43BED

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3579DC

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

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