Need an Electrician's Wisdom

Hi everyone, first post here and feel kind of bad if there is a community and I am selfishly blasting a question as my first post, but have a time sensitive issue.

I am a blacksmith, novice carpenter "handyman" type guy on the side. I recently began renovating an apartment for a friend, and needed to change a few light fixtures which I have done numerous times with lights, ceiling fans etc.

I got through 2 out of 3 with no problems, however in the bathroom I pulled out an old vanity that had lights and was wired into the wall naturally. My friend replaced it with a simple single bulb ceiling light and a simple mirror.

I wired it the way I always would, paying close attention to how the original light was wired. They lead to a double switch, meaning two single light switches in a double plate. One leads to the ceiling light and fan, the other to the light I wired in. Run of the mill situation to professionals I'm sure.

From the wall there is only the main line which consists of a black wire, the copper grounding wire (that I fastened to the green grounding screw on the plate) and a beige wire.

On the light fixture there is only a white wire, and a black wire. I connected the beige to the white (probably the issue) and black to the black. Connected everything, light works fine.

However..... I can't turn it off, the light switch has no effect.

I respect electricity, and I respect what it can do. I don't want to start a fire so I wasn't about to fiddle with it without seeing if someone can look at my diagram and maybe see the simple error. If anyone knowledgeable is willing to take a look at the picture link and see if they can't figure out what the problem is I would sincerely appreciate it.