Grass side tga texture isn’t working properly as on Java

I am making a texture pack for Minecraft bedrock, and I tried to make a grass block texture. But when I made the grey grass side (tga) and tried to look at it in action.... the dirt on grass texture was pitch black. I tried to find information how to do it, and I found an information that I could add dirt to the tga texture, but making it 15% transparent. It worked, but not quite perfect because the dirt on grass texture a bit greener than original dirt block. Please, could you texture files, so it will match Java pack? I saw some videos on making grass texture for Java, and they did the same thing as I, but it worked for Java.