Long-time follower, awww thanks *u*

[^We barely get to see her glove in this shot, white lace/fishnet, very cool, so I ‘shopped 2 stills together to capture her hand and her expression here <3]
You know, I didn’t realize this was a question until I went into book!IWTV and started skimming w/ my *~deadly competency~* (I like that!) to answer you.
The short answer: It looks like it’s Louis’ fault for saying her eyes are violet ONCE, just once, during IWTV. So I’d say that was a trick of the light in that scene, or smtg, bc Lestat and Jesse say Claudia’s eyes are/were blue.
They don’t specify what kind of blue, though.
I headcanon Claudia’s eyes as being blue. Specifically, I would say a light blue. Most fanartists make them varied shades of blue, but usually not dark blue, and not blue-green.
IIRC, her eye color isn’t really elaborated on, but her eyes are often described as being “liquid,” or absorbing the light in the area, so do with that information what you will.
Here’s one of the more memorable examples of her eyes being described, but not by their color (Louis in IWTV again):
I turned around and saw in the light from the street her eyes, like two dark flames in her white face. A doll from whom someone had cruelly ripped the eyes and replaced them with a demonic fire.
^Dark flames? And blue? IDK but I’d go with that.
Hit the jump for a few canon quotes about her eye color.
A) Blue eyes:
“ `It was something hurried,’ I said, trying now to meet her eyes. How perfectly, coldly blue they were. How earnest.
^This is Louis talking about Claudia’s eyes when he’s trying to explain what making love was like, from IWTV.
The child moved into the light from the window as she came towards Jesse, and the light struck her blue eyes, her rounded cheeks, her soft naked little arms.
^This is Jesse talking about ghost!Claudia in QOTD, but then that’s a ghost… so idk if you count that.
I saw Claudia quite vividly… a tiny oval portrait on porcelain – golden hair, blue eyes. Something fierce and true in the expression, in spite of the saccharine colors and the oval frame.
^Lestat talking about the locket w/ Claudia’s portrait in TOBT, which he had stolen from her dead mom bc hey, you can’t take it w/ you!
B) Violet eyes:
” `But is there no crime amongst you, no cardinal crime?’ Claudia asked. Her violet eyes seemed fixed on me, even in the mirror, as I stood with my back to her.
^Later in IWTV, Louis says her eyes are violet, but it’s only on one page, and, IIRC, Lestat never describes her eyes are violet… I can’t explain that but it seems like mistake, or it was a trick of the lighting, idk!