Here is Alice's Preliminary testimony on whether she saw any blood on Lizzie or not:
Q. Where were you sitting?
A. Right beside her.
Q. Did you notice whether there was any blood on her or not?
A. I did not see anything.
Q. On her hands?
A. No Sir.
Q. Did you see her hands?
A. Yes Sir, I rubbed them.
Q. Were there any signs of any blood on them?
A. No Sir.
Q. Did you observe her face?
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A. I bathed her face.
Q. Were there any signs of blood on it?
A. No Sir.
Q. Or on her hair?
A. No Sir.
Q. Was her hair done up, as usual?
A. I think it must have been, or I would have noticed it.
Q. Did you notice any signs of blood on that?
A. No Sir.
Q. Did you notice any signs of blood on her clothing, or her dress?
A. No Sir.
I do agree with Kat, that it would be possible not to particularly notice what Lizzie was wearing outside of some blouse and skirt, but, notice if there was bloodstains, fresh or dried, on it.
Theres more with Alice's observations that vex me. Granted, as I believe that Phoebe Bowen put it, that they were not looking for fashions that day. Alice couldn't tell what Lizzie had on the day of the murders, but, when shown the dress and blouse that Lizzie had turned over to the police as what she allegedly wore in court, Alice was able to tell that the skirt was silk and the bouse was sateen.
Sateen and Bengaline silk are both lustrous fabrics, they have a soft sheen to them and reflect light to a certain point. I certainly would'nt pertain to them as Dr. Bowen did by calling them a "Drab dress". I went back in the archives and found where in the past I had posted samples of the materials involved, I'll try to post them again here.
Samples of Bedford cord material, the material shown is made of wool, not cotton like Lizzie's Bedford cord dress:
From this site:
http://www.hirschauto.com/samples/bedford.htm
Examples of Bengaline silk, and yes, Kat was correct in the past, the ribs go horizontally in items made from it:
And though this example is just sheets and pillow shams, its navy blue, gives you a good idea of what Lizzie's sateen blouse looked like given to the police:

“Sometimes when we are generous in small, barely detectable ways it can change someone else's life forever.”-Margaret Cho comedienne