#3783CC#3783CC

#3783CC is a mid, vivid cyan. Relative luminance 0.214; OKLCH L 59.8% C 0.134 H 250.4°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#3783CC
RGB	rgb(55, 131, 204)
HSL	hsl(209, 59%, 51%)
HSV	hsv(209, 73%, 80%)
CMYK	cmyk(73%, 35.8%, 0%, 20%)
CIE-LAB	lab(53.39, 1.19, -44.48)
CIE-LCH	lch(53.39, 44.50, 271.54°)
OKLab	oklab(59.76% -0.0451 -0.1265)
OKLCH	oklch(59.76% 0.134 250.4)
XYZ	xyz(20.5868, 21.4021, 60.1611)
Luminance	0.2140 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3783CC #CC8037

analogous

#37CCCB #3783CC #3738CC

triadic

#3783CC #CC3783 #83CC37

tetradic

#3783CC #CB37CC #CC8037 #38CC37

square

#3783CC #CB37CC #CC8037 #38CC37

split-complementary

#3783CC #CC3738 #CCCB37

monochromatic

#1C456D #28649E #3783CC #68A1D8 #99BFE5

Accessibility & contrast

On white

3.98

#3783CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#3783CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3783CC

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3783CC	#FFFFFF	#000000	##000000
##3783CC	1.00	3.98	5.28	5.28
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6287CF

Deuteranopia (green-blind)

#4C79CB

Tritanopia (blue-blind)

#00949E

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #3783cc;
/* rgb */ color: rgb(55, 131, 204);
/* oklch */ color: oklch(59.8% 0.134 250.4);

Tailwind

colors: {
  custom: {
    50: '#81a6dc',
    500: '#3783cc',
    950: '#000000',
  },
}

SCSS

$custom: #3783cc;
$custom-light: #81a6dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3783cc",
  "rgb": {
    "r": 55,
    "g": 131,
    "b": 204
  },
  "hsl": {
    "h": 209.396,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.59757,
    "c": 0.13433,
    "h": 250.4
  },
  "luminance": 0.21404
}

Semantic roles & 50–950 ramp

primary

#3783CC

secondary

#D0AF8E

accent

#9245E3

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3783CC

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

Preview Lab → · Contrast checker → · Palette generator →