use hex color with transparency in the colors parameter

Hello Developer:

plot_ly(mtcars, 
        x = ~mpg,
        y = ~cyl,
        color = ~as.factor(cyl),
        colors = c("#3B4992A3","red","green"))

When I use a hex color with transparency in the colors parameter, it doesn't work, how can I fix it？

When I use as below, although the colors are correct, but the order is wrong.

plot_ly(mtcars, 
        x = ~mpg,
        y = ~cyl,
        color = ~as.factor(cyl),
        marker = list(
          color = c("#3B4992A3","red","green")))

先使用 colors 參數中的透明十六進位顏色重現提供的 plot_ly(mtcars, ...) 範例，然後將其與 marker color 範例比較。追蹤顏色如何指派給因子層級，並驗證透明十六進位顏色可以被接受，同時保留預期的顏色到層級順序。範例依預期順序呈現預期顏色即表示完成。