toRGB: Convert R colours to RGBA hexadecimal colour values

In trafficonese/plotly_mini: Create Interactive Web Graphics via 'plotly.js'

Description

Convert R colours to RGBA hexadecimal colour values

Usage

toRGB(x, alpha = 1)

Arguments

x	see the col argument in col2rgb for valid specifications
alpha	alpha channel on 0-1 scale

Value

hexadecimal colour value (if is.na(x), return "transparent" for compatibility with Plotly)

Examples

toRGB("steelblue") 
# [1] "rgba(70,130,180,1)"

m <- list(
  color = toRGB("red"),
  line = list(
    color = toRGB("black"), 
    width = 19
  )
)

plot_ly(x = 1, y = 1, marker = m)

trafficonese/plotly_mini documentation built on Sept. 14, 2019, 9:51 p.m.