Raster recolouring — botanical illustration pack

I have a licensed set of 30 botanical PNG illustrations (300dpi, raster — not vector) that need recolouring into a specific brand palette. The files are in a painterly, textured style.

I need two versions of every file:

Flat fill — clean solid colours, no texture. Priority version for use on small printed labels.
Texture-preserved — original painterly quality maintained. For website and social media use.

The brand palette:

Cream #F9F4EC · Pink #D81E5B · Botanical Orange #D95D39 · Yellow #FDB813 · Olive Green #6C7D47 · Slate Teal #3B7080 · Soft Rose #E7C6C7 · Warm Neutral #F2E8DB · Charcoal #2C3E50 · Brown-Black #3B3028

I will provide a colour mapping guide giving general principles for translating the original colours into the brand palette — you should be able to apply this consistently across most assets using your judgement. Two specific assets (a flower and a berry stem) have detailed individual briefs and will need particular care.

To start: I'd like to commission the two priority assets first as a paid test before confirming the full job.
Please share examples of previous raster recolouring work on illustrated files. Photo retouching experience is not relevant here.