Red is a colour ranging from pink (purple-red) to orange (yellow-red). Red is traditionally associated with danger, stop, blood, warnings, prohibition. Red can evoke images of blood, and hence of murder, of ghoulishness and of horror. Red is associated with energy, activity, anger, fertility and is associated with the planetMars and with war.
Apple - Almost any shade of red you wish. A purely poetic term, though more usually applied to a pale green.
Auburn - A reddish-brown colour, the colour of an orang-utan's hair. Auburn is usually used to describe the colour of hair.
Burgundy - A dark, purplish-red colour of Burgundywine.
Crimson - A deep rich-red inclining towards purple.
Ruddle - A deep orange-red ochre-based pigment used for marking sheep.
Ruddy - Tinged with red. Reddish. Implying a colour of blood.
Rusty - Reddish-brown or brownish-orange colour of iron oxide (rust). Rusty implies decay, age, weathering.
Rufous - Rust-coloured. Rufous implies more organic than mineral, an animal may be described as being rufous in colour, while a weathered piece of iron is more likely rusty.
Russet - Reddish-brown. Russet is more usually applied to flora, such as apples or potatoes, while rufous may describe an animal and rusty a mineral or metal item.
Rubicund - Tinged with red. Rubicund is used to describe a person's complexion, and implies the appearance that occurs as a result of excessive good living. The ruddy complexion one might achieve from plenty of alcoholconsumption, for example.
Sanguine - A rather archaic term for the red colour of blood, implying blood.