#3681CF#3681CF

#3681CF is a mid, vivid cyan. Relative luminance 0.210; OKLCH L 59.4% C 0.140 H 252.1°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#3681CF
RGB	rgb(54, 129, 207)
HSL	hsl(211, 61%, 51%)
HSV	hsv(211, 74%, 81%)
CMYK	cmyk(73.9%, 37.7%, 0%, 18.8%)
CIE-LAB	lab(52.94, 3.35, -46.90)
CIE-LCH	lch(52.94, 47.02, 274.08°)
OKLab	oklab(59.45% -0.0431 -0.1336)
OKLCH	oklch(59.45% 0.14 252.1)
XYZ	xyz(20.6298, 20.9874, 61.9831)
Luminance	0.2099 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3681CF #CF8436

analogous

#36CECF #3681CF #3736CF

triadic

#3681CF #CF3681 #81CF36

tetradic

#3681CF #CF36CE #CF8436 #36CF37

square

#3681CF #CF36CE #CF8436 #36CF37

split-complementary

#3681CF #CF3736 #CECF36

monochromatic

#1B4470 #2763A1 #3681CF #67A0DB #99BFE7

Accessibility & contrast

On white

4.04

#3681CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#3681CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3681CF

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3681CF	#FFFFFF	#000000	##000000
##3681CF	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D86D2

Deuteranopia (green-blind)

#4578CD

Tritanopia (blue-blind)

#00939E

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3681cf;
/* rgb */ color: rgb(54, 129, 207);
/* oklch */ color: oklch(59.4% 0.140 252.1);

Tailwind

colors: {
  custom: {
    50: '#81a5de',
    500: '#3681cf',
    950: '#000000',
  },
}

SCSS

$custom: #3681cf;
$custom-light: #81a5de;
$custom-dark: #000000;

JSON

{
  "hex": "#3681cf",
  "rgb": {
    "r": 54,
    "g": 129,
    "b": 207
  },
  "hsl": {
    "h": 210.588,
    "s": 61.446,
    "l": 51.176
  },
  "oklch": {
    "l": 0.59447,
    "c": 0.14044,
    "h": 252.1
  },
  "luminance": 0.2099
}

Semantic roles & 50–950 ramp

primary

#3681CF

secondary

#D2B18F

accent

#9543E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3681CF

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

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