Title won't change colour

Hi, I'm trying to edit the colour of my title but it refuses to play ball. I've tried it using the option offered under colors but it doesn't change anything. I'm realising as I write that these options probably offer to change the "header" text that I have already deleted. To change the colour of the title lettering I've used the following css: .site-title { color: white; } I've also applied several other transformations including changing the background colour which have all worked fine and I have also used the same code to change the tagline colour with no issues. I've also tried to use "background: transparent;" as per a previous thread complaining of grey tones on their header image, but to no avail. Any clues as to what's going on? Cheers