Appearance of wine
The main reason we look at wine is to determine if it’s faulty, and perhaps to get an indication of age.
Hold the glass at 45 degrees against something plain and white to do this properly. Can you see light reflect in the wine? Or is it hazy? Hazy typically indicates a fault, though many natural wines now will have a cloudiness to them due to being unfiltered.
How intense is it? Use a scale here from pale to deep.
What colour is it? With white, at a basic level, look for green/lemon, gold or amber. Rosé can be pink, salmon or orange. Red can be purple, ruby, garnet, tawny or brown.
The browner notes in both white and red are signs of ageing. The majority of young reds will be ruby or purple. Aged wines start to gather the garnet, or tawny notes. Some young wines go brown quicker than others, which I would sometimes note down when tasting a wine (‘Looks older than it is’).