Bright colourful animation looks insipid and washed out. 😢

Hi guys. I'm completing a bright colourful animation using Animate CC 2024 which I exported it in Quicktime. The audio is terrific but the rich colours are washed out and insipid. The colour palette is so bright and vibrant on the animate stage, but just horrible in the export. It used to be simple to adjust colour on a slider in Quicktime but that seems to have gone. In animate CC 2024 I can't find a way to enrich the colour depth. How can I get my bright vibrant colours back? The whole animation looks dull and white washed in Quicktime. Please can someone help and send me screen shots or suggest a way to brighten the colours? I exported using 1920 x 1080 dimensions and Quicktime - Apple ProRes 422 (HQ) setting. Maybe something else would be better to bring back the colours? Thank you for any help in advance! I really hope you have some suggestions 🤞 Wishes, nikki