#3581CC#3581CC

#3581CC is a mid, vivid cyan. Relative luminance 0.208; OKLCH L 59.2% C 0.137 H 251.1°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#3581CC
RGB	rgb(53, 129, 204)
HSL	hsl(210, 60%, 50%)
HSV	hsv(210, 74%, 80%)
CMYK	cmyk(74%, 36.8%, 0%, 20%)
CIE-LAB	lab(52.75, 2.13, -45.50)
CIE-LCH	lch(52.75, 45.55, 272.68°)
OKLab	oklab(59.24% -0.0445 -0.1296)
OKLCH	oklch(59.24% 0.137 251.1)
XYZ	xyz(20.2134, 20.8147, 60.0674)
Luminance	0.2082 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3581CC #CC8035

analogous

#35CCCB #3581CC #3535CC

triadic

#3581CC #CC3581 #81CC35

tetradic

#3581CC #CB35CC #CC8035 #35CC35

square

#3581CC #CB35CC #CC8035 #35CC35

split-complementary

#3581CC #CC3535 #CCCB35

monochromatic

#1B446B #27629C #3581CC #669FD8 #97BEE5

Accessibility & contrast

On white

4.07

#3581CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#3581CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3581CC

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3581CC	#FFFFFF	#000000	##000000
##3581CC	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E86CF

Deuteranopia (green-blind)

#4878CB

Tritanopia (blue-blind)

#00939D

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3581cc;
/* rgb */ color: rgb(53, 129, 204);
/* oklch */ color: oklch(59.2% 0.137 251.1);

Tailwind

colors: {
  custom: {
    50: '#80a5dc',
    500: '#3581cc',
    950: '#000000',
  },
}

SCSS

$custom: #3581cc;
$custom-light: #80a5dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3581cc",
  "rgb": {
    "r": 53,
    "g": 129,
    "b": 204
  },
  "hsl": {
    "h": 209.801,
    "s": 59.684,
    "l": 50.392
  },
  "oklch": {
    "l": 0.59238,
    "c": 0.13698,
    "h": 251.1
  },
  "luminance": 0.20817
}

Semantic roles & 50–950 ramp

primary

#3581CC

secondary

#D0AE8D

accent

#9345E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3581CC

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

Preview Lab → · Contrast checker → · Palette generator →