#3780BC#3780BC

#3780BC is a mid, moderate cyan. Relative luminance 0.199; OKLCH L 58.2% C 0.117 H 246.5°. Best body text is #000000 at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3780BC
RGB	rgb(55, 128, 188)
HSL	hsl(207, 55%, 48%)
HSV	hsv(207, 71%, 74%)
CMYK	cmyk(70.7%, 31.9%, 0%, 26.3%)
CIE-LAB	lab(51.70, -2.74, -38.02)
CIE-LCH	lch(51.70, 38.12, 265.89°)
OKLab	oklab(58.17% -0.0467 -0.1077)
OKLCH	oklch(58.17% 0.117 246.5)
XYZ	xyz(18.3684, 19.8794, 50.4363)
Luminance	0.1988 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780BC #BC7337

analogous

#37BCB6 #3780BC #373DBC

triadic

#3780BC #BC3780 #80BC37

tetradic

#3780BC #B637BC #BC7337 #3DBC37

square

#3780BC #B637BC #BC7337 #3DBC37

split-complementary

#3780BC #BC373D #BCB637

monochromatic

#1B405D #29608D #3780BC #609ED0 #8FBBDE

Accessibility & contrast

On white

4.22

#3780BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.98

#3780BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780BC

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780BC	#FFFFFF	#000000	##000000
##3780BC	1.00	4.22	4.98	4.98
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.98	21.00	1.00	1.00
##000000	4.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6582BF

Deuteranopia (green-blind)

#5276BB

Tritanopia (blue-blind)

#008E95

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #3780bc;
/* rgb */ color: rgb(55, 128, 188);
/* oklch */ color: oklch(58.2% 0.117 246.5);

Tailwind

colors: {
  custom: {
    50: '#7ea4d0',
    500: '#3780bc',
    950: '#000000',
  },
}

SCSS

$custom: #3780bc;
$custom-light: #7ea4d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3780bc",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 188
  },
  "hsl": {
    "h": 207.068,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.58168,
    "c": 0.1174,
    "h": 246.5
  },
  "luminance": 0.19881
}

Semantic roles & 50–950 ramp

primary

#3780BC

secondary

#C9A486

accent

#8D4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #3780BC

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

Preview Lab → · Contrast checker → · Palette generator →