Green/blue texas usually refers to H. Carpintis, and "normal" to H. Cyanoguttatus. Size and care requirements are the same, just color difference.
For pretty much any of these fish you will want a similar setup. The décor is up to you, whatever you think looks best. I always go for a natural looking setup, with sand wood rocks and plants. I would recommend some sort of floating plants and some dither fish like mollys, large swordtails, goodeids. These will make the fish feel more secure and less likely to hide or be shy. I have kept all of these fish around 78* with no problems. pH they like on the higher side, but as long as yours isn't super low (well below 7), they are adaptable and should be fine. I would over-filter, and expect to do once a week cleaning and 50% water change, which is considered normal for any fish.