a. Free PPT download url
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2. https://ibaotu.com/ppt/3-0-0-0-0-1.html? Chan=bd& Label=ppt& The plan=A1 - bd& KWD=2218 & amp; The unit=12956 & amp; Renqun_youhua=1977751 & amp; Bd_vid=10933539036456442174
2. Colour collocation summary
1. The collocation of colour to render scene, attract attention, to express views,
2. High-tech class cool color department, such as general use blue or black gray neutral colors,
3. A work to have those who unite is tonal,
4. The colour is not more than three,
5. A work to have a mass-tone attune, complementary color, then consider complementary color,
6. Work color general with a triangle in the color wheel, rectangular rule is given priority to, such as