#3683CF#3683CF

#3683CF is a mid, vivid cyan. Relative luminance 0.215; OKLCH L 59.9% C 0.138 H 251.1°. Best body text is #000000 at 5.30:1 contrast (WCAG AA passes).

Color values

HEX	#3683CF
RGB	rgb(54, 131, 207)
HSL	hsl(210, 61%, 51%)
HSV	hsv(210, 74%, 81%)
CMYK	cmyk(73.9%, 36.7%, 0%, 18.8%)
CIE-LAB	lab(53.51, 2.14, -45.98)
CIE-LCH	lch(53.51, 46.03, 272.67°)
OKLab	oklab(59.9% -0.0449 -0.1309)
OKLCH	oklch(59.9% 0.138 251.1)
XYZ	xyz(20.8959, 21.5195, 62.0718)
Luminance	0.2152 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3683CF #CF8236

analogous

#36CFCF #3683CF #3636CF

triadic

#3683CF #CF3683 #83CF36

tetradic

#3683CF #CF36CF #CF8236 #36CF36

square

#3683CF #CF36CF #CF8236 #36CF36

split-complementary

#3683CF #CF3636 #CFCF36

monochromatic

#1B4670 #2764A1 #3683CF #67A1DB #99C0E7

Accessibility & contrast

On white

3.96

#3683CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.30

#3683CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3683CF

5.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3683CF	#FFFFFF	#000000	##000000
##3683CF	1.00	3.96	5.30	5.30
#FFFFFF	3.96	1.00	21.00	21.00
#000000	5.30	21.00	1.00	1.00
##000000	5.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6088D2

Deuteranopia (green-blind)

#4979CE

Tritanopia (blue-blind)

#00959F

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3683cf;
/* rgb */ color: rgb(54, 131, 207);
/* oklch */ color: oklch(59.9% 0.138 251.1);

Tailwind

colors: {
  custom: {
    50: '#81a6de',
    500: '#3683cf',
    950: '#000000',
  },
}

SCSS

$custom: #3683cf;
$custom-light: #81a6de;
$custom-dark: #000000;

JSON

{
  "hex": "#3683cf",
  "rgb": {
    "r": 54,
    "g": 131,
    "b": 207
  },
  "hsl": {
    "h": 209.804,
    "s": 61.446,
    "l": 51.176
  },
  "oklch": {
    "l": 0.59899,
    "c": 0.13843,
    "h": 251.1
  },
  "luminance": 0.21522
}

Semantic roles & 50–950 ramp

primary

#3683CF

secondary

#D2B08F

accent

#9343E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3683CF

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

Preview Lab → · Contrast checker → · Palette generator →