#3579DA#3579DA

#3579DA is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.3% C 0.164 H 257.9°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3579DA
RGB	rgb(53, 121, 218)
HSL	hsl(215, 69%, 53%)
HSV	hsv(215, 76%, 85%)
CMYK	cmyk(75.7%, 44.5%, 0%, 14.5%)
CIE-LAB	lab(51.26, 12.16, -55.81)
CIE-LCH	lch(51.26, 57.12, 282.29°)
OKLab	oklab(58.34% -0.0344 -0.1599)
OKLCH	oklch(58.34% 0.164 257.9)
XYZ	xyz(20.9558, 19.4912, 68.9738)
Luminance	0.1949 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579DA #DA9635

analogous

#35CBDA #3579DA #4335DA

triadic

#3579DA #DA3579 #79DA35

tetradic

#3579DA #DA35CB #DA9635 #35DA43

square

#3579DA #DA35CB #DA9635 #35DA43

split-complementary

#3579DA #DA4335 #CBDA35

monochromatic

#17417E #205CB1 #3579DA #699BE3 #9CBEED

Accessibility & contrast

On white

4.29

#3579DA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#3579DA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3579DA

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579DA	#FFFFFF	#000000	##000000
##3579DA	1.00	4.29	4.90	4.90
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4782DE

Deuteranopia (green-blind)

#2473D8

Tritanopia (blue-blind)

#00909F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3579da;
/* rgb */ color: rgb(53, 121, 218);
/* oklch */ color: oklch(58.3% 0.164 257.9);

Tailwind

colors: {
  custom: {
    50: '#839fe6',
    500: '#3579da',
    950: '#000000',
  },
}

SCSS

$custom: #3579da;
$custom-light: #839fe6;
$custom-dark: #000000;

JSON

{
  "hex": "#3579da",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 218
  },
  "hsl": {
    "h": 215.273,
    "s": 69.038,
    "l": 53.137
  },
  "oklch": {
    "l": 0.58335,
    "c": 0.16361,
    "h": 257.9
  },
  "luminance": 0.19494
}

Semantic roles & 50–950 ramp

primary

#3579DA

secondary

#D9BC92

accent

#A33CEC

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3579DA

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

Preview Lab → · Contrast checker → · Palette generator →