#3688BC#3688BC

#3688BC is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 60.0% C 0.112 H 240.3°. Best body text is #000000 at 5.40:1 contrast (WCAG AA passes).

Color values

HEX	#3688BC
RGB	rgb(54, 136, 188)
HSL	hsl(203, 55%, 47%)
HSV	hsv(203, 71%, 74%)
CMYK	cmyk(71.3%, 27.7%, 0%, 26.3%)
CIE-LAB	lab(54.05, -7.55, -34.34)
CIE-LCH	lch(54.05, 35.16, 257.60°)
OKLab	oklab(60.01% -0.0552 -0.0969)
OKLCH	oklch(60.01% 0.112 240.3)
XYZ	xyz(19.3991, 22.0213, 50.7954)
Luminance	0.2202 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3688BC #BC6A36

analogous

#36BCAD #3688BC #3645BC

triadic

#3688BC #BC3688 #88BC36

tetradic

#3688BC #AD36BC #BC6A36 #45BC36

square

#3688BC #AD36BC #BC6A36 #45BC36

split-complementary

#3688BC #BC3645 #BCAD36

monochromatic

#1B435D #28668C #3688BC #5EA4D1 #8EBFDF

Accessibility & contrast

On white

3.89

#3688BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.40

#3688BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3688BC

5.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3688BC	#FFFFFF	#000000	##000000
##3688BC	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)

#7088BE

Deuteranopia (green-blind)

#5E7BBB

Tritanopia (blue-blind)

#00959A

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3688bc;
/* rgb */ color: rgb(54, 136, 188);
/* oklch */ color: oklch(60.0% 0.112 240.3);

Tailwind

colors: {
  custom: {
    50: '#7eaad0',
    500: '#3688bc',
    950: '#000000',
  },
}

SCSS

$custom: #3688bc;
$custom-light: #7eaad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3688bc",
  "rgb": {
    "r": 54,
    "g": 136,
    "b": 188
  },
  "hsl": {
    "h": 203.284,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.60015,
    "c": 0.11155,
    "h": 240.3
  },
  "luminance": 0.22023
}

Semantic roles & 50–950 ramp

primary

#3688BC

secondary

#C99F85

accent

#8349DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3688BC

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

Preview Lab → · Contrast checker → · Palette generator →