#3780D0#3780D0

#3780D0 is a mid, vivid cyan. Relative luminance 0.208; OKLCH L 59.3% C 0.142 H 253.1°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#3780D0
RGB	rgb(55, 128, 208)
HSL	hsl(211, 62%, 52%)
HSV	hsv(211, 74%, 82%)
CMYK	cmyk(73.6%, 38.5%, 0%, 18.4%)
CIE-LAB	lab(52.73, 4.45, -47.79)
CIE-LCH	lch(52.73, 47.99, 275.32°)
OKLab	oklab(59.31% -0.0414 -0.1362)
OKLCH	oklch(59.31% 0.142 253.1)
XYZ	xyz(20.6756, 20.8023, 62.5879)
Luminance	0.2081 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780D0 #D08737

analogous

#37CCD0 #3780D0 #3B37D0

triadic

#3780D0 #D03780 #80D037

tetradic

#3780D0 #D037CC #D08737 #37D03B

square

#3780D0 #D037CC #D08737 #37D03B

split-complementary

#3780D0 #D03B37 #CCD037

monochromatic

#1B4472 #2662A3 #3780D0 #699FDC #9ABFE7

Accessibility & contrast

On white

4.07

#3780D0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#3780D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780D0

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780D0	#FFFFFF	#000000	##000000
##3780D0	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B86D3

Deuteranopia (green-blind)

#4377CE

Tritanopia (blue-blind)

#00939E

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3780d0;
/* rgb */ color: rgb(55, 128, 208);
/* oklch */ color: oklch(59.3% 0.142 253.1);

Tailwind

colors: {
  custom: {
    50: '#81a4df',
    500: '#3780d0',
    950: '#000000',
  },
}

SCSS

$custom: #3780d0;
$custom-light: #81a4df;
$custom-dark: #000000;

JSON

{
  "hex": "#3780d0",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 208
  },
  "hsl": {
    "h": 211.373,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.59314,
    "c": 0.14239,
    "h": 253.1
  },
  "luminance": 0.20805
}

Semantic roles & 50–950 ramp

primary

#3780D0

secondary

#D3B390

accent

#9843E5

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3780D0

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

Preview Lab → · Contrast checker → · Palette generator →