This Hoya Wayetii has beautiful sun stressed leaves that varies between a chartreuse, light green, and reddish colored leaves. Typically when it receives direct sun or bright-direct light, the leaves become even a darker ruby like color.
It has been growing in a well-draining potting mix in an area where it receives bright indirect-light in a warm environment. It can tolerate direct sun, but would likely need to be watered more often.
Be sure to allow the potting mix to dry out in-between each watering. When just watered, you will find that the leaves are very thick and firm. As the potting mix dries out, the leaves of the hoya become less firm.