Entry Title/site title font size

I’m having a weird css problem with the twenty twelve theme. I’m trying to alter both entry title and site title fonts. I’m able to change the font family, but I can’t change the font size, and in the site title, I can’t change the color (I can in the entry title). Here’s the custom CSS:

.site-title {
text-align: center;
font-family: ‘Tangerine’, cursive;
color: blue;
font-size: 200%;
}

.entry-title {
text-align: center;
font-family: ‘Tangerine’, cursive;
font-size: 175%;
color: blue;
}

Any suggestions? What am I missing?

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