#3780B4#3780B4

#3780B4 is a mid, moderate cyan. Relative luminance 0.195; OKLCH L 57.7% C 0.108 H 242.9°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#3780B4
RGB	rgb(55, 128, 180)
HSL	hsl(205, 53%, 46%)
HSV	hsv(205, 69%, 71%)
CMYK	cmyk(69.4%, 28.9%, 0%, 29.4%)
CIE-LAB	lab(51.32, -5.55, -34.03)
CIE-LCH	lch(51.32, 34.48, 260.73°)
OKLab	oklab(57.74% -0.0492 -0.0961)
OKLCH	oklch(57.74% 0.108 242.9)
XYZ	xyz(17.5298, 19.5440, 46.0197)
Luminance	0.1955 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3780B4 #B46B37

analogous

#37B4A9 #3780B4 #3741B4

triadic

#3780B4 #B43780 #80B437

tetradic

#3780B4 #A937B4 #B46B37 #41B437

square

#3780B4 #A937B4 #B46B37 #41B437

split-complementary

#3780B4 #B43741 #B4A937

monochromatic

#1A3D56 #295F85 #3780B4 #5B9ECD #8ABADB

Accessibility & contrast

On white

4.28

#3780B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#3780B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3780B4

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3780B4	#FFFFFF	#000000	##000000
##3780B4	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6881B6

Deuteranopia (green-blind)

#5775B3

Tritanopia (blue-blind)

#008D92

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #3780b4;
/* rgb */ color: rgb(55, 128, 180);
/* oklch */ color: oklch(57.7% 0.108 242.9);

Tailwind

colors: {
  custom: {
    50: '#7ca4ca',
    500: '#3780b4',
    950: '#000000',
  },
}

SCSS

$custom: #3780b4;
$custom-light: #7ca4ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3780b4",
  "rgb": {
    "r": 55,
    "g": 128,
    "b": 180
  },
  "hsl": {
    "h": 204.96,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.5774,
    "c": 0.10794,
    "h": 242.9
  },
  "luminance": 0.19546
}

Semantic roles & 50–950 ramp

primary

#3780B4

secondary

#C69E81

accent

#884BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B0F13

muted

#7C7F82

Preview Lab

Preview with #3780B4

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

Preview Lab → · Contrast checker → · Palette generator →