Super cute!

Here is the alba version called cardioglossa albascense. Opens pure white and turns a strong yellow after about a week. This is not a prelude to fading, remains yellow for a couple of weeks before it fades.

Sorry for the lack of focus, the colors are shown demonstrating that the yellow is a definite meaningful change, not a pre-fade condition. It's about to go deciduous, I keep watering it never the less.

Nick