Remarks on Colour line that 'There is no such thing as phenomenology, though there are phenomenological problems.' He was content to regard Goethe's observations as a kind of logic or geometry. Wittgenstein took his examples from the Runge letter included in the "Farbenlehre", e.g. "White is the lightest colour", "There cannot be a transparent white", "There cannot be a reddish green", and so on. The logical status of these propositions in Wittgenstein's investigation, including their relation to physics, was discussed in Jonathan Westphal's "Colour: a Philosophical Introduction" (1991). Although "Remarks on Colour" is considered difficult on account of its fragmentation, his last work,
Buff (colour) such a material. Unless bleached or dyed, paper products, such as Manila paper, tend to be buff. Buff envelopes are used extensively in commercial mailings. Buff paper is sometimes favoured by artists seeking a neutral background colour for drawings, especially those featuring the colour white. Buff domesticated animals and plants have been created, including dogs, cats, and poultry. The word "buff" is used in written standards of several breeds, and some, such as the Buff turkey, are specifically named "buff". In 16th- and 17th-century European cultures, buff waistcoats ("vests" in American English), were considered proper casual wear. In the 17th