#3688BB#3688BB

#3688BB is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 60.0% C 0.110 H 239.8°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3688BB
RGB	rgb(54, 136, 187)
HSL	hsl(203, 55%, 47%)
HSV	hsv(203, 71%, 73%)
CMYK	cmyk(71.1%, 27.3%, 0%, 26.7%)
CIE-LAB	lab(54.00, -7.90, -33.84)
CIE-LCH	lch(54.00, 34.75, 256.86°)
OKLab	oklab(59.96% -0.0556 -0.0955)
OKLCH	oklch(59.96% 0.11 239.8)
XYZ	xyz(19.2916, 21.9783, 50.2296)
Luminance	0.2198 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3688BB #BB6936

analogous

#36BBAC #3688BB #3645BB

triadic

#3688BB #BB3688 #88BB36

tetradic

#3688BB #AC36BB #BB6936 #45BB36

square

#3688BB #AC36BB #BB6936 #45BB36

split-complementary

#3688BB #BB3645 #BBAC36

monochromatic

#1B435C #28658C #3688BB #5EA4D0 #8DBFDE

Accessibility & contrast

On white

3.89

#3688BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#3688BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3688BB

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3688BB	#FFFFFF	#000000	##000000
##3688BB	1.00	3.89	5.40	5.40
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.40	21.00	1.00	1.00
##000000	5.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7088BD

Deuteranopia (green-blind)

#5E7BBA

Tritanopia (blue-blind)

#00959A

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3688bb;
/* rgb */ color: rgb(54, 136, 187);
/* oklch */ color: oklch(60.0% 0.110 239.8);

Tailwind

colors: {
  custom: {
    50: '#7daacf',
    500: '#3688bb',
    950: '#000000',
  },
}

SCSS

$custom: #3688bb;
$custom-light: #7daacf;
$custom-dark: #000000;

JSON

{
  "hex": "#3688bb",
  "rgb": {
    "r": 54,
    "g": 136,
    "b": 187
  },
  "hsl": {
    "h": 203.008,
    "s": 55.187,
    "l": 47.255
  },
  "oklch": {
    "l": 0.59964,
    "c": 0.11046,
    "h": 239.8
  },
  "luminance": 0.2198
}

Semantic roles & 50–950 ramp

primary

#3688BB

secondary

#C99E84

accent

#8349DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3688BB

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

Preview Lab → · Contrast checker → · Palette generator →