Well the way I hide radio text is by making the Font 0 it is not Ideal but it works. Randy is right in saying that a radio is not ideal for your scenario I have made Colour Pickers many times and a lot look like this one that you want but I do not Radios I use a horizontal Gallery.
So I would add a horizontal gallery and make it's items the following:
["Green","Yellow","Orange","Red","Purple","Blue","Grey","Black"]
Then I would add in a circle and a check (badge) icon into the gallery and adjust the height and width of the gallery:
Then set the OnSelect Property of the gallery to this:
Set(varColSel,ThisItem.Value)
Then click the circle and change the fill property to:
If(ThisItem.IsSelected,Switch(varColSel,"Red",Red,"Green",Green,"Yellow",Yellow,"Pink",DeepPink,"Black",Black,"White",White,"Purple",Purple,"Blue",Blue,"Gray",Gray,"Orange",Orange),White)
Change the visible property of the check badge to:
ThisItem.IsSelected
then move the circle behind the check (badge) like so:
I would use this as it functions and looks better I would however change the fill RGBAs to different values that might be prettier colours e.g. the green looks a tad dark.
let me know if this meets your needs and is a solution to your problem
