#3780C9#3780C9

#3780C9 is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 58.9% C 0.133 H 251.2°. Best body text is #000000 at 5.09:1 contrast (WCAG AA passes).

Color values

HEX	#3780C9
RGB	rgb(55, 128, 201)
HSL	hsl(210, 57%, 50%)
HSV	hsv(210, 73%, 79%)
CMYK	cmyk(72.6%, 36.3%, 0%, 21.2%)
CIE-LAB	lab(52.36, 1.91, -44.41)
CIE-LCH	lch(52.36, 44.45, 272.47°)
OKLab	oklab(58.9% -0.0431 -0.1263)
OKLCH	oklch(58.9% 0.133 251.2)
XYZ	xyz(19.8334, 20.4654, 58.1520)
Luminance	0.2047 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780C9 #C98037

analogous

#37C9C9 #3780C9 #3737C9

triadic

#3780C9 #C93780 #80C937

tetradic

#3780C9 #C937C9 #C98037 #37C937

square

#3780C9 #C937C9 #C98037 #37C937

split-complementary

#3780C9 #C93737 #C9C937

monochromatic

#1C4369 #296199 #3780C9 #679FD6 #97BDE3

Accessibility & contrast

On white

4.12

#3780C9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.09

#3780C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780C9

5.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780C9	#FFFFFF	#000000	##000000
##3780C9	1.00	4.12	5.09	5.09
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.09	21.00	1.00	1.00
##000000	5.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F84CC

Deuteranopia (green-blind)

#4977C8

Tritanopia (blue-blind)

#00919B

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3780c9;
/* rgb */ color: rgb(55, 128, 201);
/* oklch */ color: oklch(58.9% 0.133 251.2);

Tailwind

colors: {
  custom: {
    50: '#80a4da',
    500: '#3780c9',
    950: '#000000',
  },
}

SCSS

$custom: #3780c9;
$custom-light: #80a4da;
$custom-dark: #000000;

JSON

{
  "hex": "#3780c9",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 201
  },
  "hsl": {
    "h": 210,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.58901,
    "c": 0.13349,
    "h": 251.2
  },
  "luminance": 0.20468
}

Semantic roles & 50–950 ramp

primary

#3780C9

secondary

#CFAE8D

accent

#9447E1

background

#F8FAFD

surface

#F0F3FA

border

#CBCDD3

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3780C9

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

Preview Lab → · Contrast checker → · Palette generator →