#3580CB#3580CB

#3580CB is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 59.0% C 0.137 H 251.3°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#3580CB
RGB	rgb(53, 128, 203)
HSL	hsl(210, 59%, 50%)
HSV	hsv(210, 74%, 80%)
CMYK	cmyk(73.9%, 36.9%, 0%, 20.4%)
CIE-LAB	lab(52.40, 2.37, -45.48)
CIE-LCH	lch(52.40, 45.54, 272.98°)
OKLab	oklab(58.95% -0.0438 -0.1295)
OKLCH	oklch(58.95% 0.137 251.3)
XYZ	xyz(19.9628, 20.5048, 59.3940)
Luminance	0.2051 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3580CB #CB8035

analogous

#35CBCB #3580CB #3535CB

triadic

#3580CB #CB3580 #80CB35

tetradic

#3580CB #CB35CB #CB8035 #35CB35

square

#3580CB #CB35CB #CB8035 #35CB35

split-complementary

#3580CB #CB3535 #CBCB35

monochromatic

#1B436A #28619B #3580CB #669FD8 #96BDE4

Accessibility & contrast

On white

4.12

#3580CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#3580CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3580CB

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3580CB	#FFFFFF	#000000	##000000
##3580CB	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D85CE

Deuteranopia (green-blind)

#4777CA

Tritanopia (blue-blind)

#00929C

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3580cb;
/* rgb */ color: rgb(53, 128, 203);
/* oklch */ color: oklch(59.0% 0.137 251.3);

Tailwind

colors: {
  custom: {
    50: '#80a4db',
    500: '#3580cb',
    950: '#000000',
  },
}

SCSS

$custom: #3580cb;
$custom-light: #80a4db;
$custom-dark: #000000;

JSON

{
  "hex": "#3580cb",
  "rgb": {
    "r": 53,
    "g": 128,
    "b": 203
  },
  "hsl": {
    "h": 210,
    "s": 59.055,
    "l": 50.196
  },
  "oklch": {
    "l": 0.58952,
    "c": 0.13672,
    "h": 251.3
  },
  "luminance": 0.20507
}

Semantic roles & 50–950 ramp

primary

#3580CB

secondary

#CFAE8C

accent

#9446E2

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3580CB

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

Preview Lab → · Contrast checker → · Palette generator →