Hello,
1) You can use Custom Heading element and set the desired color via settings of this element. 2) It is margin of header – http://prntscr.com/qa7koh You can use the next code to remove it for all pages of categories
.tax-product_cat .header-main { margin-bottom: 0px; }
or edit your statick block and set – http://prntscr.com/qa7lin 3) Add margin-bottom for row of your static block http://prntscr.com/qa7mtz
Regards
