#3687BB#3687BB

#3687BB is a mid, moderate cyan. Relative luminance 0.217; OKLCH L 59.7% C 0.111 H 240.6°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#3687BB
RGB	rgb(54, 135, 187)
HSL	hsl(203, 55%, 47%)
HSV	hsv(203, 71%, 73%)
CMYK	cmyk(71.1%, 27.8%, 0%, 26.7%)
CIE-LAB	lab(53.70, -7.32, -34.31)
CIE-LCH	lch(53.70, 35.08, 257.95°)
OKLab	oklab(59.73% -0.0546 -0.0968)
OKLCH	oklch(59.73% 0.111 240.6)
XYZ	xyz(19.1515, 21.6979, 50.1829)
Luminance	0.2170 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3687BB #BB6A36

analogous

#36BBAD #3687BB #3644BB

triadic

#3687BB #BB3687 #87BB36

tetradic

#3687BB #AD36BB #BB6A36 #44BB36

square

#3687BB #AD36BB #BB6A36 #44BB36

split-complementary

#3687BB #BB3644 #BBAD36

monochromatic

#1B425C #28658C #3687BB #5EA4D0 #8DBFDE

Accessibility & contrast

On white

3.93

#3687BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#3687BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3687BB

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3687BB	#FFFFFF	#000000	##000000
##3687BB	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F87BD

Deuteranopia (green-blind)

#5D7BBA

Tritanopia (blue-blind)

#009499

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3687bb;
/* rgb */ color: rgb(54, 135, 187);
/* oklch */ color: oklch(59.7% 0.111 240.6);

Tailwind

colors: {
  custom: {
    50: '#7da9cf',
    500: '#3687bb',
    950: '#000000',
  },
}

SCSS

$custom: #3687bb;
$custom-light: #7da9cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3687bb",
  "rgb": {
    "r": 54,
    "g": 135,
    "b": 187
  },
  "hsl": {
    "h": 203.459,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.59727,
    "c": 0.11115,
    "h": 240.6
  },
  "luminance": 0.217
}

Semantic roles & 50–950 ramp

primary

#3687BB

secondary

#C99F84

accent

#8449DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3687BB

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

Preview Lab → · Contrast checker → · Palette generator →