ErinDayhaw

here is a screen shot. thanks!

Site URL: http://www.erindayhaw.squarespace.com I want to preface this question with I am not very knowledgeable with design vocabulary within squarespace. I am using Image blocks with different designs (overlap, collage, etc) and I am including "subtitle" text on each one. However, I want to be able to add a background on the text. I am able to do it on the title of the image blocks, but not the "subtitle". Is there a CSS code I could insert to add a background to this text? Also, is there a way to add different colors of background text to different image blocks instead of the background being the same color for the entire website? website is: http://www.erindayhaw.squarespace.com