#3579B3#3579B3

#3579B3 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 56.0% C 0.113 H 247.3°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3579B3
RGB	rgb(53, 121, 179)
HSL	hsl(208, 54%, 45%)
HSV	hsv(208, 70%, 70%)
CMYK	cmyk(70.4%, 32.4%, 0%, 29.8%)
CIE-LAB	lab(49.11, -2.07, -36.92)
CIE-LCH	lch(49.11, 36.98, 266.79°)
OKLab	oklab(55.97% -0.0437 -0.1046)
OKLCH	oklch(55.97% 0.113 247.3)
XYZ	xyz(16.4392, 17.6845, 45.1862)
Luminance	0.1769 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3579B3 #B36F35

analogous

#35B3AE #3579B3 #353AB3

triadic

#3579B3 #B33579 #79B335

tetradic

#3579B3 #AE35B3 #B36F35 #3AB335

square

#3579B3 #AE35B3 #B36F35 #3AB335

split-complementary

#3579B3 #B3353A #B3AE35

monochromatic

#193955 #275984 #3579B3 #5897CD #87B5DB

Accessibility & contrast

On white

4.63

#3579B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3579B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3579B3

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3579B3	#FFFFFF	#000000	##FFFFFF
##3579B3	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7BB5

Deuteranopia (green-blind)

#4D6FB2

Tritanopia (blue-blind)

#00878E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3579b3;
/* rgb */ color: rgb(53, 121, 179);
/* oklch */ color: oklch(56.0% 0.113 247.3);

Tailwind

colors: {
  custom: {
    50: '#7b9fca',
    500: '#3579b3',
    950: '#000000',
  },
}

SCSS

$custom: #3579b3;
$custom-light: #7b9fca;
$custom-dark: #000000;

JSON

{
  "hex": "#3579b3",
  "rgb": {
    "r": 53,
    "g": 121,
    "b": 179
  },
  "hsl": {
    "h": 207.619,
    "s": 54.31,
    "l": 45.49
  },
  "oklch": {
    "l": 0.55965,
    "c": 0.11335,
    "h": 247.3
  },
  "luminance": 0.17686
}

Semantic roles & 50–950 ramp

primary

#3579B3

secondary

#C59F7F

accent

#8E4ADE

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3579B3

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

Preview Lab → · Contrast checker → · Palette generator →