#3579DD#3579DD

#3579DD is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.5% C 0.168 H 258.3°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#3579DD
RGB	rgb(53, 121, 221)
HSL	hsl(216, 71%, 54%)
HSV	hsv(216, 76%, 87%)
CMYK	cmyk(76%, 45.2%, 0%, 13.3%)
CIE-LAB	lab(51.44, 13.27, -57.21)
CIE-LCH	lch(51.44, 58.73, 283.06°)
OKLab	oklab(58.53% -0.0339 -0.1641)
OKLCH	oklch(58.53% 0.168 258.3)
XYZ	xyz(21.3519, 19.6496, 71.0600)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579DD #DD9935

analogous

#35CDDD #3579DD #4535DD

triadic

#3579DD #DD3579 #79DD35

tetradic

#3579DD #DD35CD #DD9935 #35DD45

square

#3579DD #DD35CD #DD9935 #35DD45

split-complementary

#3579DD #DD4535 #CDDD35

monochromatic

#164282 #1F5CB6 #3579DD #699CE6 #9EBEEF

Accessibility & contrast

On white

4.26

#3579DD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#3579DD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579DD

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579DD	#FFFFFF	#000000	##000000
##3579DD	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4483E1

Deuteranopia (green-blind)

#1E73DB

Tritanopia (blue-blind)

#0091A0

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3579dd;
/* rgb */ color: rgb(53, 121, 221);
/* oklch */ color: oklch(58.5% 0.168 258.3);

Tailwind

colors: {
  custom: {
    50: '#839fe8',
    500: '#3579dd',
    950: '#000000',
  },
}

SCSS

$custom: #3579dd;
$custom-light: #839fe8;
$custom-dark: #000000;

JSON

{
  "hex": "#3579dd",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 221
  },
  "hsl": {
    "h": 215.714,
    "s": 71.186,
    "l": 53.725
  },
  "oklch": {
    "l": 0.58534,
    "c": 0.16754,
    "h": 258.3
  },
  "luminance": 0.19652
}

Semantic roles & 50–950 ramp

primary

#3579DD

secondary

#DBBE93

accent

#A53AEE

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3579DD

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

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