#3783BB#3783BB

#3783BB is a mid, moderate cyan. Relative luminance 0.206; OKLCH L 58.8% C 0.114 H 243.9°. Best body text is #000000 at 5.13:1 contrast (WCAG AA passes).

Color values

HEX	#3783BB
RGB	rgb(55, 131, 187)
HSL	hsl(205, 55%, 47%)
HSV	hsv(205, 71%, 73%)
CMYK	cmyk(70.6%, 29.9%, 0%, 26.7%)
CIE-LAB	lab(52.54, -4.85, -36.13)
CIE-LCH	lch(52.54, 36.45, 262.35°)
OKLab	oklab(58.82% -0.05 -0.1021)
OKLCH	oklch(58.82% 0.114 243.9)
XYZ	xyz(18.6581, 20.6306, 50.0029)
Luminance	0.2063 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3783BB #BB6F37

analogous

#37BBB1 #3783BB #3741BB

triadic

#3783BB #BB3783 #83BB37

tetradic

#3783BB #B137BB #BB6F37 #41BB37

square

#3783BB #B137BB #BB6F37 #41BB37

split-complementary

#3783BB #BB3741 #BBB137

monochromatic

#1B415C #29628C #3783BB #5FA0D0 #8EBCDE

Accessibility & contrast

On white

4.10

#3783BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.13

#3783BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3783BB

5.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3783BB	#FFFFFF	#000000	##000000
##3783BB	1.00	4.10	5.13	5.13
#FFFFFF	4.10	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)

#6A84BD

Deuteranopia (green-blind)

#5778BA

Tritanopia (blue-blind)

#009197

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #3783bb;
/* rgb */ color: rgb(55, 131, 187);
/* oklch */ color: oklch(58.8% 0.114 243.9);

Tailwind

colors: {
  custom: {
    50: '#7ea6cf',
    500: '#3783bb',
    950: '#000000',
  },
}

SCSS

$custom: #3783bb;
$custom-light: #7ea6cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3783bb",
  "rgb": {
    "r": 55,
    "g": 131,
    "b": 187
  },
  "hsl": {
    "h": 205.455,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.58816,
    "c": 0.11372,
    "h": 243.9
  },
  "luminance": 0.20633
}

Semantic roles & 50–950 ramp

primary

#3783BB

secondary

#C9A285

accent

#894ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3783BB

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

Preview Lab → · Contrast checker → · Palette generator →