Hello,

1. The color of the subtitle can be changed here – https://prnt.sc/2IZ018k11U8g

2. Navigate to the slider itself and in its settings at the bottom set another bg image here – https://prnt.sc/S7ZzmtxCxFnJ

3. Edit the “Section title” element -> Advanced -> Background – https://prnt.sc/JY5qK7FlUfp9

Kind Regards