#3780CD#3780CD

#3780CD is a mid, vivid cyan. Relative luminance 0.207; OKLCH L 59.1% C 0.139 H 252.3°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#3780CD
RGB	rgb(55, 128, 205)
HSL	hsl(211, 60%, 51%)
HSV	hsv(211, 73%, 80%)
CMYK	cmyk(73.2%, 37.6%, 0%, 19.6%)
CIE-LAB	lab(52.57, 3.36, -46.34)
CIE-LCH	lch(52.57, 46.47, 274.15°)
OKLab	oklab(59.14% -0.0421 -0.132)
OKLCH	oklch(59.14% 0.139 252.3)
XYZ	xyz(20.3100, 20.6561, 60.6624)
Luminance	0.2066 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780CD #CD8437

analogous

#37CBCD #3780CD #3937CD

triadic

#3780CD #CD3780 #80CD37

tetradic

#3780CD #CD37CB #CD8437 #37CD39

square

#3780CD #CD37CB #CD8437 #37CD39

split-complementary

#3780CD #CD3937 #CBCD37

monochromatic

#1C446E #28629F #3780CD #689FD9 #99BEE5

Accessibility & contrast

On white

4.09

#3780CD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#3780CD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780CD

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780CD	#FFFFFF	#000000	##000000
##3780CD	1.00	4.09	5.13	5.13
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.13	21.00	1.00	1.00
##000000	5.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C85D0

Deuteranopia (green-blind)

#4677CB

Tritanopia (blue-blind)

#00929D

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3780cd;
/* rgb */ color: rgb(55, 128, 205);
/* oklch */ color: oklch(59.1% 0.139 252.3);

Tailwind

colors: {
  custom: {
    50: '#81a4dc',
    500: '#3780cd',
    950: '#000000',
  },
}

SCSS

$custom: #3780cd;
$custom-light: #81a4dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3780cd",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 205
  },
  "hsl": {
    "h": 210.8,
    "s": 60,
    "l": 50.98
  },
  "oklch": {
    "l": 0.59135,
    "c": 0.13857,
    "h": 252.3
  },
  "luminance": 0.20658
}

Semantic roles & 50–950 ramp

primary

#3780CD

secondary

#D1B18F

accent

#9645E3

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3780CD

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

Preview Lab → · Contrast checker → · Palette generator →