#3783CB#3783CB

#3783CB is a mid, vivid cyan. Relative luminance 0.214; OKLCH L 59.7% C 0.133 H 250.1°. Best body text is #000000 at 5.27:1 contrast (WCAG AA passes).

Color values

HEX	#3783CB
RGB	rgb(55, 131, 203)
HSL	hsl(209, 59%, 51%)
HSV	hsv(209, 73%, 80%)
CMYK	cmyk(72.9%, 35.5%, 0%, 20.4%)
CIE-LAB	lab(53.34, 0.84, -44.00)
CIE-LCH	lch(53.34, 44.01, 271.09°)
OKLab	oklab(59.7% -0.0454 -0.1251)
OKLCH	oklch(59.7% 0.133 250.1)
XYZ	xyz(20.4673, 21.3543, 59.5314)
Luminance	0.2136 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3783CB #CB7F37

analogous

#37CBC9 #3783CB #3739CB

triadic

#3783CB #CB3783 #83CB37

tetradic

#3783CB #C937CB #CB7F37 #39CB37

square

#3783CB #C937CB #CB7F37 #39CB37

split-complementary

#3783CB #CB3739 #CBC937

monochromatic

#1C456C #29649C #3783CB #68A1D8 #98BFE4

Accessibility & contrast

On white

3.98

#3783CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.27

#3783CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3783CB

5.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3783CB	#FFFFFF	#000000	##000000
##3783CB	1.00	3.98	5.27	5.27
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.27	21.00	1.00	1.00
##000000	5.27	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6287CE

Deuteranopia (green-blind)

#4C79CA

Tritanopia (blue-blind)

#00949D

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #3783cb;
/* rgb */ color: rgb(55, 131, 203);
/* oklch */ color: oklch(59.7% 0.133 250.1);

Tailwind

colors: {
  custom: {
    50: '#80a6db',
    500: '#3783cb',
    950: '#000000',
  },
}

SCSS

$custom: #3783cb;
$custom-light: #80a6db;
$custom-dark: #000000;

JSON

{
  "hex": "#3783cb",
  "rgb": {
    "r": 55,
    "g": 131,
    "b": 203
  },
  "hsl": {
    "h": 209.189,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.59699,
    "c": 0.13308,
    "h": 250.1
  },
  "luminance": 0.21357
}

Semantic roles & 50–950 ramp

primary

#3783CB

secondary

#D0AE8E

accent

#9246E2

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #3783CB

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

Preview Lab → · Contrast checker → · Palette generator →