It would be useful to clarify whether the image specified as a splash screen to the JVM should be shown "as is" (without color deviations, without additional graphical elements like borders etc). Of course if such limitation is applicable.

If for example my-splash-image.gif (or png, or jpg) contains absolutely red rectangle and an implementation shows it as orange, will such implementation be conformant? (We analyse the color programmatically by taking a snapshot from the screen)
Something like the following is needed:

"With 32-bit color depth the implementation should output precisely the same picture as the splashscreen picture contain. It means that with 99,9% probability colors that are captured as a splash image screen shot are equal to those contained in graphics file. There might be slight derivations due to the peculiarities of the native system color management"