#3780D1#3780D1

#3780D1 is a mid, vivid cyan. Relative luminance 0.209; OKLCH L 59.4% C 0.144 H 253.4°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#3780D1
RGB	rgb(55, 128, 209)
HSL	hsl(212, 63%, 52%)
HSV	hsv(212, 74%, 82%)
CMYK	cmyk(73.7%, 38.8%, 0%, 18%)
CIE-LAB	lab(52.79, 4.81, -48.27)
CIE-LCH	lch(52.79, 48.51, 275.69°)
OKLab	oklab(59.37% -0.0411 -0.1377)
OKLCH	oklch(59.37% 0.144 253.4)
XYZ	xyz(20.7991, 20.8517, 63.2378)
Luminance	0.2085 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780D1 #D18837

analogous

#37CDD1 #3780D1 #3B37D1

triadic

#3780D1 #D13780 #80D137

tetradic

#3780D1 #D137CD #D18837 #37D13B

square

#3780D1 #D137CD #D18837 #37D13B

split-complementary

#3780D1 #D13B37 #CDD137

monochromatic

#1A4473 #2662A5 #3780D1 #69A0DC #9BBFE8

Accessibility & contrast

On white

4.06

#3780D1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#3780D1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780D1

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780D1	#FFFFFF	#000000	##000000
##3780D1	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A86D4

Deuteranopia (green-blind)

#4277CF

Tritanopia (blue-blind)

#00939E

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3780d1;
/* rgb */ color: rgb(55, 128, 209);
/* oklch */ color: oklch(59.4% 0.144 253.4);

Tailwind

colors: {
  custom: {
    50: '#81a4df',
    500: '#3780d1',
    950: '#000000',
  },
}

SCSS

$custom: #3780d1;
$custom-light: #81a4df;
$custom-dark: #000000;

JSON

{
  "hex": "#3780d1",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 209
  },
  "hsl": {
    "h": 211.558,
    "s": 62.602,
    "l": 51.765
  },
  "oklch": {
    "l": 0.59374,
    "c": 0.14367,
    "h": 253.4
  },
  "luminance": 0.20854
}

Semantic roles & 50–950 ramp

primary

#3780D1

secondary

#D4B490

accent

#9842E6

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3780D1

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

Preview Lab → · Contrast checker → · Palette generator →