#3687D9#3687D9

#3687D9 is a mid, vivid cyan. Relative luminance 0.231; OKLCH L 61.4% C 0.147 H 251.7°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3687D9
RGB	rgb(54, 135, 217)
HSL	hsl(210, 68%, 53%)
HSV	hsv(210, 75%, 85%)
CMYK	cmyk(75.1%, 37.8%, 0%, 14.9%)
CIE-LAB	lab(55.20, 3.36, -48.95)
CIE-LCH	lch(55.20, 49.07, 273.93°)
OKLab	oklab(61.39% -0.046 -0.1396)
OKLCH	oklch(61.39% 0.147 251.7)
XYZ	xyz(22.7050, 23.1193, 68.8980)
Luminance	0.2312 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3687D9 #D98836

analogous

#36D9D9 #3687D9 #3636D9

triadic

#3687D9 #D93687 #87D936

tetradic

#3687D9 #D936D9 #D98836 #36D936

square

#3687D9 #D936D9 #D98836 #36D936

split-complementary

#3687D9 #D93636 #D9D936

monochromatic

#184A7D #2168B0 #3687D9 #69A6E3 #9DC4EC

Accessibility & contrast

On white

3.73

#3687D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.62

#3687D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3687D9

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3687D9	#FFFFFF	#000000	##000000
##3687D9	1.00	3.73	5.62	5.62
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.62	21.00	1.00	1.00
##000000	5.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#618CDC

Deuteranopia (green-blind)

#477DD7

Tritanopia (blue-blind)

#009AA5

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #3687d9;
/* rgb */ color: rgb(54, 135, 217);
/* oklch */ color: oklch(61.4% 0.147 251.7);

Tailwind

colors: {
  custom: {
    50: '#83a9e5',
    500: '#3687d9',
    950: '#000000',
  },
}

SCSS

$custom: #3687d9;
$custom-light: #83a9e5;
$custom-dark: #000000;

JSON

{
  "hex": "#3687d9",
  "rgb": {
    "r": 54,
    "g": 135,
    "b": 217
  },
  "hsl": {
    "h": 210.184,
    "s": 68.201,
    "l": 53.137
  },
  "oklch": {
    "l": 0.61388,
    "c": 0.14697,
    "h": 251.7
  },
  "luminance": 0.23122
}

Semantic roles & 50–950 ramp

primary

#3687D9

secondary

#D9B692

accent

#943DEB

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0C0F16

muted

#7D7F84

Preview Lab

Preview with #3687D9

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

Preview Lab → · Contrast checker → · Palette generator →