#3787BC#3787BC

#3787BC is a mid, moderate cyan. Relative luminance 0.218; OKLCH L 59.8% C 0.112 H 241.3°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#3787BC
RGB	rgb(55, 135, 188)
HSL	hsl(204, 55%, 48%)
HSV	hsv(204, 71%, 74%)
CMYK	cmyk(70.7%, 28.2%, 0%, 26.3%)
CIE-LAB	lab(53.78, -6.83, -34.76)
CIE-LCH	lch(53.78, 35.42, 258.88°)
OKLab	oklab(59.81% -0.0537 -0.0981)
OKLCH	oklch(59.81% 0.112 241.3)
XYZ	xyz(19.3131, 21.7689, 50.7512)
Luminance	0.2177 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3787BC #BC6C37

analogous

#37BCAF #3787BC #3744BC

triadic

#3787BC #BC3787 #87BC37

tetradic

#3787BC #AF37BC #BC6C37 #44BC37

square

#3787BC #AF37BC #BC6C37 #44BC37

split-complementary

#3787BC #BC3744 #BCAF37

monochromatic

#1B435D #29658D #3787BC #60A4D0 #8FBFDE

Accessibility & contrast

On white

3.92

#3787BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#3787BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3787BC

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3787BC	#FFFFFF	#000000	##000000
##3787BC	1.00	3.92	5.35	5.35
#FFFFFF	3.92	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)

#6F88BE

Deuteranopia (green-blind)

#5C7BBB

Tritanopia (blue-blind)

#009499

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #3787bc;
/* rgb */ color: rgb(55, 135, 188);
/* oklch */ color: oklch(59.8% 0.112 241.3);

Tailwind

colors: {
  custom: {
    50: '#7ea9d0',
    500: '#3787bc',
    950: '#000000',
  },
}

SCSS

$custom: #3787bc;
$custom-light: #7ea9d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3787bc",
  "rgb": {
    "r": 55,
    "g": 135,
    "b": 188
  },
  "hsl": {
    "h": 203.91,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.59811,
    "c": 0.11184,
    "h": 241.3
  },
  "luminance": 0.21771
}

Semantic roles & 50–950 ramp

primary

#3787BC

secondary

#C9A186

accent

#854ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3787BC

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

Preview Lab → · Contrast checker → · Palette generator →