#3784BB#3784BB

#3784BB is a mid, moderate cyan. Relative luminance 0.209; OKLCH L 59.1% C 0.113 H 243.2°. Best body text is #000000 at 5.18:1 contrast (WCAG AA passes).

Color values

HEX	#3784BB
RGB	rgb(55, 132, 187)
HSL	hsl(205, 55%, 47%)
HSV	hsv(205, 71%, 73%)
CMYK	cmyk(70.6%, 29.4%, 0%, 26.7%)
CIE-LAB	lab(52.84, -5.44, -35.66)
CIE-LCH	lch(52.84, 36.07, 261.33°)
OKLab	oklab(59.05% -0.051 -0.1008)
OKLCH	oklch(59.05% 0.113 243.2)
XYZ	xyz(18.7930, 20.9005, 50.0478)
Luminance	0.2090 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3784BB #BB6E37

analogous

#37BBB0 #3784BB #3742BB

triadic

#3784BB #BB3784 #84BB37

tetradic

#3784BB #B037BB #BB6E37 #42BB37

square

#3784BB #B037BB #BB6E37 #42BB37

split-complementary

#3784BB #BB3742 #BBB037

monochromatic

#1B415C #29638C #3784BB #5FA1D0 #8EBDDE

Accessibility & contrast

On white

4.05

#3784BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.18

#3784BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3784BB

5.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3784BB	#FFFFFF	#000000	##000000
##3784BB	1.00	4.05	5.18	5.18
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.18	21.00	1.00	1.00
##000000	5.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B85BD

Deuteranopia (green-blind)

#5978BA

Tritanopia (blue-blind)

#009197

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #3784bb;
/* rgb */ color: rgb(55, 132, 187);
/* oklch */ color: oklch(59.1% 0.113 243.2);

Tailwind

colors: {
  custom: {
    50: '#7ea7cf',
    500: '#3784bb',
    950: '#000000',
  },
}

SCSS

$custom: #3784bb;
$custom-light: #7ea7cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3784bb",
  "rgb": {
    "r": 55,
    "g": 132,
    "b": 187
  },
  "hsl": {
    "h": 205,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.59051,
    "c": 0.11294,
    "h": 243.2
  },
  "luminance": 0.20903
}

Semantic roles & 50–950 ramp

primary

#3784BB

secondary

#C9A185

accent

#884ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3784BB

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

Preview Lab → · Contrast checker → · Palette generator →