Coffee beans are varying shades of green, over time the colour leaches out leaving a brown bean.
Brown or chocolate brown
Because Coffee is a dark colour and if your testing it with universal indicator paper the paper might stain from the strong coffee colour and not be entirely accurate. I have never tried this personally its just as assumption.
From my travel experiences in the Caribbean and Central America I have seen that nitially the coffee bean starts to develop as a green colour and then ripens into a red colour. When the red bean is harvested it is then "roasted, burnt etc to get the brown colour.
No, coffee has no chemical coloring affect on your hair.
No, it's a verp pale creamy coffee colour
I am not going to recommend this as I don't know about the health effects but Coffee stains and can colour your hair, for how long I don't know.
If I put cream in my coffee, I get a color close to (R,G,B255) 186, 158, 112. does that answer your question?
skinny jeans with heels coffee colour pants ,trousers
Universal indicator typically turns a reddish-brown or yellowish-brown color in acidic solutions like coffee.
food most likely wont change the colour of your teeth but drinking coffee will stain your teeth and make it a kind of brown-ish colour.
Depends on what you are using to make the colour. Onion skins can be boiled until all the colour has come out of them then add your fabric item. Tea or coffee grounds can also be used to obtain brown colour by boiling. There are various other natural products that can be used (rhubard leaves, berries, cochineal etc) but I'm not an expert, I've only tried tea & coffee!
Coffee is acidic due to its pH value ranges typically from 4.85 to 5.10. On pH paper with a pH value of 5, coffee would likely turn red or a shade of pink indicating its acidity.