Dear project owner,
The Brief is very short can you explain
What colour to use?
and Style of the graphic design.

The style should be something that is easily recognizable as a 300 px thumbnail as it is at full size. Colors I prefer are earth tones and pinks or turquoise, but the color isn't as important as the design. The podcast is a daily report about all of the lions, tigers, leopards, jaguars and other big cats at Big Cat Rescue in Tampa, FL so you could derive from Florida's palm trees, sand, sea and pink and turquoise colors.