Change color of background Image

Hi Developers,

Please guide me about this. I have applied background image. I want to light the color of background image. Its dark grey i want it in light grey. What should i do?

• This topic was modified 4 years, 10 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Developing with WordPress topic

The page I need help with: [log in to see the link]