#3787BB#3787BB

#3787BB is a mid, moderate cyan. Relative luminance 0.217; OKLCH L 59.8% C 0.111 H 240.8°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#3787BB
RGB	rgb(55, 135, 187)
HSL	hsl(204, 55%, 47%)
HSV	hsv(204, 71%, 73%)
CMYK	cmyk(70.6%, 27.8%, 0%, 26.7%)
CIE-LAB	lab(53.73, -7.18, -34.26)
CIE-LCH	lch(53.73, 35.00, 258.17°)
OKLab	oklab(59.76% -0.054 -0.0967)
OKLCH	oklch(59.76% 0.111 240.8)
XYZ	xyz(19.2057, 21.7259, 50.1854)
Luminance	0.2173 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3787BB #BB6B37

analogous

#37BBAD #3787BB #3745BB

triadic

#3787BB #BB3787 #87BB37

tetradic

#3787BB #AD37BB #BB6B37 #45BB37

square

#3787BB #AD37BB #BB6B37 #45BB37

split-complementary

#3787BB #BB3745 #BBAD37

monochromatic

#1B435C #29658C #3787BB #5FA4D0 #8EBFDE

Accessibility & contrast

On white

3.93

#3787BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#3787BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3787BB

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3787BB	#FFFFFF	#000000	##000000
##3787BB	1.00	3.93	5.35	5.35
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.35	21.00	1.00	1.00
##000000	5.35	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: #3787bb;
/* rgb */ color: rgb(55, 135, 187);
/* oklch */ color: oklch(59.8% 0.111 240.8);

Tailwind

colors: {
  custom: {
    50: '#7ea9cf',
    500: '#3787bb',
    950: '#000000',
  },
}

SCSS

$custom: #3787bb;
$custom-light: #7ea9cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3787bb",
  "rgb": {
    "r": 55,
    "g": 135,
    "b": 187
  },
  "hsl": {
    "h": 203.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.59759,
    "c": 0.11074,
    "h": 240.8
  },
  "luminance": 0.21728
}

Semantic roles & 50–950 ramp

primary

#3787BB

secondary

#C9A085

accent

#844ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3787BB

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

Preview Lab → · Contrast checker → · Palette generator →