#3780B8#3780B8

#3780B8 is a mid, moderate cyan. Relative luminance 0.197; OKLCH L 58.0% C 0.113 H 244.8°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#3780B8
RGB	rgb(55, 128, 184)
HSL	hsl(206, 54%, 47%)
HSV	hsv(206, 70%, 72%)
CMYK	cmyk(70.1%, 30.4%, 0%, 27.8%)
CIE-LAB	lab(51.51, -4.15, -36.03)
CIE-LCH	lch(51.51, 36.27, 263.43°)
OKLab	oklab(57.95% -0.0479 -0.1019)
OKLCH	oklch(57.95% 0.113 244.8)
XYZ	xyz(17.9432, 19.7093, 48.1967)
Luminance	0.1971 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780B8 #B86F37

analogous

#37B8B0 #3780B8 #373FB8

triadic

#3780B8 #B83780 #80B837

tetradic

#3780B8 #B037B8 #B86F37 #3FB837

square

#3780B8 #B037B8 #B86F37 #3FB837

split-complementary

#3780B8 #B8373F #B8B037

monochromatic

#1B3E5A #295F89 #3780B8 #5D9ECF #8DBADD

Accessibility & contrast

On white

4.25

#3780B8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#3780B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780B8

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780B8	#FFFFFF	#000000	##000000
##3780B8	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6782BA

Deuteranopia (green-blind)

#5575B7

Tritanopia (blue-blind)

#008E94

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3780b8;
/* rgb */ color: rgb(55, 128, 184);
/* oklch */ color: oklch(58.0% 0.113 244.8);

Tailwind

colors: {
  custom: {
    50: '#7da4cd',
    500: '#3780b8',
    950: '#000000',
  },
}

SCSS

$custom: #3780b8;
$custom-light: #7da4cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3780b8",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 184
  },
  "hsl": {
    "h": 206.047,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.57951,
    "c": 0.11261,
    "h": 244.8
  },
  "luminance": 0.19711
}

Semantic roles & 50–950 ramp

primary

#3780B8

secondary

#C7A184

accent

#8A4ADD

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3780B8

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

Preview Lab → · Contrast checker → · Palette generator →