#3688B2#3688B2

#3688B2 is a mid, moderate cyan. Relative luminance 0.216; OKLCH L 59.5% C 0.101 H 234.5°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#3688B2
RGB	rgb(54, 136, 178)
HSL	hsl(200, 53%, 45%)
HSV	hsv(200, 70%, 70%)
CMYK	cmyk(69.7%, 23.6%, 0%, 30.2%)
CIE-LAB	lab(53.61, -11.00, -29.31)
CIE-LCH	lch(53.61, 31.31, 249.43°)
OKLab	oklab(59.52% -0.0587 -0.0824)
OKLCH	oklch(59.52% 0.101 234.5)
XYZ	xyz(18.3582, 21.6049, 45.3135)
Luminance	0.2161 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3688B2 #B26036

analogous

#36B29E #3688B2 #364AB2

triadic

#3688B2 #B23688 #88B236

tetradic

#3688B2 #9E36B2 #B26036 #4AB236

square

#3688B2 #9E36B2 #B26036 #4AB236

split-complementary

#3688B2 #B2364A #B29E36

monochromatic

#1A4054 #286483 #3688B2 #59A5CD #88BFDB

Accessibility & contrast

On white

3.95

#3688B2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#3688B2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3688B2

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3688B2	#FFFFFF	#000000	##000000
##3688B2	1.00	3.95	5.32	5.32
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7487B4

Deuteranopia (green-blind)

#637BB1

Tritanopia (blue-blind)

#009396

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3688b2;
/* rgb */ color: rgb(54, 136, 178);
/* oklch */ color: oklch(59.5% 0.101 234.5);

Tailwind

colors: {
  custom: {
    50: '#7caac9',
    500: '#3688b2',
    950: '#000000',
  },
}

SCSS

$custom: #3688b2;
$custom-light: #7caac9;
$custom-dark: #000000;

JSON

{
  "hex": "#3688b2",
  "rgb": {
    "r": 54,
    "g": 136,
    "b": 178
  },
  "hsl": {
    "h": 200.323,
    "s": 53.448,
    "l": 45.49
  },
  "oklch": {
    "l": 0.59516,
    "c": 0.10112,
    "h": 234.5
  },
  "luminance": 0.21607
}

Semantic roles & 50–950 ramp

primary

#3688B2

secondary

#C5977F

accent

#7C4BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3688B2

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

Preview Lab → · Contrast checker → · Palette generator →