#3680CB#3680CB

#3680CB is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 59.0% C 0.136 H 251.5°. Best body text is #000000 at 5.11:1 contrast (WCAG AA passes).

Color values

HEX	#3680CB
RGB	rgb(54, 128, 203)
HSL	hsl(210, 59%, 50%)
HSV	hsv(210, 73%, 80%)
CMYK	cmyk(73.4%, 36.9%, 0%, 20.4%)
CIE-LAB	lab(52.43, 2.50, -45.43)
CIE-LCH	lch(52.43, 45.50, 273.15°)
OKLab	oklab(58.98% -0.0432 -0.1293)
OKLCH	oklch(58.98% 0.136 251.5)
XYZ	xyz(20.0159, 20.5322, 59.3965)
Luminance	0.2053 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3680CB #CB8136

analogous

#36CBCB #3680CB #3636CB

triadic

#3680CB #CB3680 #80CB36

tetradic

#3680CB #CB36CB #CB8136 #36CB36

square

#3680CB #CB36CB #CB8136 #36CB36

split-complementary

#3680CB #CB3636 #CBCB36

monochromatic

#1C436B #28629C #3680CB #679FD8 #97BDE4

Accessibility & contrast

On white

4.11

#3680CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.11

#3680CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3680CB

5.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3680CB	#FFFFFF	#000000	##000000
##3680CB	1.00	4.11	5.11	5.11
#FFFFFF	4.11	1.00	21.00	21.00
#000000	5.11	21.00	1.00	1.00
##000000	5.11	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: #3680cb;
/* rgb */ color: rgb(54, 128, 203);
/* oklch */ color: oklch(59.0% 0.136 251.5);

Tailwind

colors: {
  custom: {
    50: '#80a4db',
    500: '#3680cb',
    950: '#000000',
  },
}

SCSS

$custom: #3680cb;
$custom-light: #80a4db;
$custom-dark: #000000;

JSON

{
  "hex": "#3680cb",
  "rgb": {
    "r": 54,
    "g": 128,
    "b": 203
  },
  "hsl": {
    "h": 210.201,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.58984,
    "c": 0.13638,
    "h": 251.5
  },
  "luminance": 0.20534
}

Semantic roles & 50–950 ramp

primary

#3680CB

secondary

#D0AF8D

accent

#9446E2

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3680CB

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

Preview Lab → · Contrast checker → · Palette generator →