#3780B9#3780B9

#3780B9 is a mid, moderate cyan. Relative luminance 0.198; OKLCH L 58.0% C 0.114 H 245.3°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#3780B9
RGB	rgb(55, 128, 185)
HSL	hsl(206, 54%, 47%)
HSV	hsv(206, 70%, 73%)
CMYK	cmyk(70.3%, 30.8%, 0%, 27.5%)
CIE-LAB	lab(51.55, -3.80, -36.53)
CIE-LCH	lch(51.55, 36.73, 264.07°)
OKLab	oklab(58.01% -0.0476 -0.1033)
OKLCH	oklch(58.01% 0.114 245.3)
XYZ	xyz(18.0483, 19.7514, 48.7507)
Luminance	0.1975 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780B9 #B97037

analogous

#37B9B1 #3780B9 #373FB9

triadic

#3780B9 #B93780 #80B937

tetradic

#3780B9 #B137B9 #B97037 #3FB937

square

#3780B9 #B137B9 #B97037 #3FB937

split-complementary

#3780B9 #B9373F #B9B137

monochromatic

#1B3F5B #295F8A #3780B9 #5E9ECF #8DBADD

Accessibility & contrast

On white

4.24

#3780B9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#3780B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780B9

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780B9	#FFFFFF	#000000	##000000
##3780B9	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6682BB

Deuteranopia (green-blind)

#5475B8

Tritanopia (blue-blind)

#008E94

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3780b9;
/* rgb */ color: rgb(55, 128, 185);
/* oklch */ color: oklch(58.0% 0.114 245.3);

Tailwind

colors: {
  custom: {
    50: '#7da4ce',
    500: '#3780b9',
    950: '#000000',
  },
}

SCSS

$custom: #3780b9;
$custom-light: #7da4ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3780b9",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 185
  },
  "hsl": {
    "h": 206.308,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.58005,
    "c": 0.11379,
    "h": 245.3
  },
  "luminance": 0.19753
}

Semantic roles & 50–950 ramp

primary

#3780B9

secondary

#C8A284

accent

#8B4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3780B9

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

Preview Lab → · Contrast checker → · Palette generator →