Responsive landing page using Flexbox

Hello everyone, hope you are good :)

I have few questions on this challenge !

1. First of all, how can i change the color of a SVG image, like in the footer, the logo should be green. I know how to change with filter but i need a specific color here not just white or black or greenish.

2. What do you think about my markup for testimonial items, i insert an image inside a blockquote, should i use figure tag here ?

3. What HTML do you use for social media links ? do you use nav tag ?

4. Here i use background image to set up the different images, is that good ? or should i use <img> tag ? I used it bc its visual image there is no link with the content.

5. What ALT do you write for 'arrow down' or link to social medias ?

Thank you ! Have a nice day