#3688CB#3688CB

#3688CB is a mid, vivid cyan. Relative luminance 0.227; OKLCH L 60.8% C 0.129 H 246.8°. Best body text is #000000 at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#3688CB
RGB	rgb(54, 136, 203)
HSL	hsl(207, 59%, 50%)
HSV	hsv(207, 73%, 80%)
CMYK	cmyk(73.4%, 33%, 0%, 20.4%)
CIE-LAB	lab(54.76, -2.26, -41.74)
CIE-LCH	lch(54.76, 41.80, 266.90°)
OKLab	oklab(60.81% -0.0507 -0.1184)
OKLCH	oklch(60.81% 0.129 246.8)
XYZ	xyz(21.1009, 22.7020, 59.7582)
Luminance	0.2270 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3688CB #CB7936

analogous

#36CBC3 #3688CB #363DCB

triadic

#3688CB #CB3688 #88CB36

tetradic

#3688CB #C336CB #CB7936 #3DCB36

square

#3688CB #C336CB #CB7936 #3DCB36

split-complementary

#3688CB #CB363D #CBC336

monochromatic

#1C476B #28689C #3688CB #67A5D8 #97C2E4

Accessibility & contrast

On white

3.79

#3688CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.54

#3688CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3688CB

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3688CB	#FFFFFF	#000000	##000000
##3688CB	1.00	3.79	5.54	5.54
#FFFFFF	3.79	1.00	21.00	21.00
#000000	5.54	21.00	1.00	1.00
##000000	5.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#698BCE

Deuteranopia (green-blind)

#547DCA

Tritanopia (blue-blind)

#0098A0

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #3688cb;
/* rgb */ color: rgb(54, 136, 203);
/* oklch */ color: oklch(60.8% 0.129 246.8);

Tailwind

colors: {
  custom: {
    50: '#80aadb',
    500: '#3688cb',
    950: '#000000',
  },
}

SCSS

$custom: #3688cb;
$custom-light: #80aadb;
$custom-dark: #000000;

JSON

{
  "hex": "#3688cb",
  "rgb": {
    "r": 54,
    "g": 136,
    "b": 203
  },
  "hsl": {
    "h": 206.98,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.60814,
    "c": 0.12883,
    "h": 246.8
  },
  "luminance": 0.22704
}

Semantic roles & 50–950 ramp

primary

#3688CB

secondary

#D0AB8D

accent

#8C46E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3688CB

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

Preview Lab → · Contrast checker → · Palette generator →