# Roku Developer Program

Developers and content creators—a complete solution for growing an audience directly.
cancel
Showing results for
Did you mean:
Level 7

## How to convert rgba to hex?

I have a color in rgba format coming from the server, but I don't think roku can understand rgba, so was wondering if there was a convenient api to convert rgba to hex?
Example:
(255, 255 , 255, 255) - > 0xFFFFFFFF

Thanks
4 Replies
Level 9

## Re: How to convert rgba to hex?

Dunno if there is one, but should be pretty easy to code one up I would think.
Level 7

## Re: How to convert rgba to hex?

Yea, I just wrote a function for it

// Example: If you input 255, 255, 255, 255 as the argument it will return "0xFFFFFFFF"
function rgbaToHex(r as integer, g as integer, b as integer, a as integer)
hexArray = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"]
hexColor = "0x"

for i = 0 to 3
colorChannel = invalid

if(i = 0) then
colorChannel = r

else if(i = 1) then
colorChannel = g

else if(i=2) then
colorChannel = b

else if(i=3) then
colorChannel = a
end if

sixteens = int(colorChannel / 16) // How many 16's can go into colorChannel (since hex is base 16)?
ones = colorChannel mod 16 // How many 1's are in the remainder?

hexColor += hexArray[sixteens] + hexArray[ones]
end for

return hexColor
end function
Level 7

## Re: How to convert rgba to hex?

Hi,
you can improve your solution by using StrI(value as Integer, radix as Integer) as String
example: StrI(255, 16) '= "ff"
Highlighted
Level 7

## Re: How to convert rgba to hex?

You can use a bitshift

function rgbToColor(r, g, b, a,LE=false)
if LE=true'(LITTLE_ENDIAN)
return ( (a << 24) + (b << 16) + (g <<  8) + r )
else
return ( (r << 24) + (g << 16) + (b <<  8) + a )
end if

end function