The design may look rather dark. This is due to Redbubble altering the colours to more accurately reflect what the design will look like on a shirt. If you don’t like the darker colours, there will be a range of stickers with original colours.
The design is transparent, so you it will look fine on any colour shirt! (Looks better on a darker shirt in my opinion)
The faces will also be made available individually as stickers and (if there is demand) shirts.