Gold and sliver are elegant and expensive. Reds and oranges are hot, exciting colors. Blues and greens are cool and tranquil. Avoid pastels and holiday theme combinations such as red and green or orange and black. More informal colloquial expressions may be used.
Sentences are also shorter and less complex.
More personal pronouns may be used in a presentation. They should not be used in a written technical paper. Feel free to explain any doubtful words or meanings. More necessary than the written word since the audience cannot go back and read it over again. Use space, time such as pauses and body language to replace punctuation marks.