CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 304 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which hex code is red? (a) #ff0000 (b) #ffff00 (c) #0000ff (d) #00ff00
2. 2.🌈 Which colour is #ffff00? (a) yellow (b) blue (c) black (d) white
3. 3.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) green (c) blue (d) red
4. 4.🌈 Which colour of light is strongest in rgb(41, 112, 156)? (a) red (b) blue (c) green
5. 5.🌈 Which colour of light is strongest in rgb(7, 210, 0)? (a) green (b) blue (c) red
6. 6.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) black (d) blue
7. 7.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 4 (c) 3 (d) 2
8. 8.🌈 Which hex code is magenta? (a) #000000 (b) #ffff00 (c) #00ffff (d) #ff00ff
9. 9.🌈 Which colour is #00ffff? (a) cyan (b) black (c) yellow (d) blue
10. 10.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 100 (d) 255
11. 11.🌈 Which colour is #00ff00? (a) bright green (b) blue (c) cyan (d) black
12. 12.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) black (c) blue (d) white
13. 13.🌈 Which colour of light is strongest in rgb(112, 129, 154)? (a) red (b) blue (c) green
14. 14.🌈 Which colour is rgb(0, 0, 255)? (a) yellow (b) magenta (c) blue (d) black
15. 15.🌈 Which colour of light is strongest in rgb(206, 47, 60)? (a) blue (b) green (c) red
16. 16.🌈 Which colour of light is strongest in rgb(23, 23, 179)? (a) blue (b) green (c) red
17. 17.🌈 In #00002c the blue part is the hex number 2c. What is it as a normal number?
18. 18.🌈 Which colour is #ff0000? (a) cyan (b) red (c) magenta (d) blue
19. 19.🌈 Which hex code is blue? (a) #ff0000 (b) #0000ff (c) #000000 (d) #ffff00
20. 20.🌈 Which colour is #ffffff? (a) white (b) blue (c) magenta (d) bright green
21. 21.🌈 Which colour of light is strongest in rgb(251, 38, 42)? (a) green (b) red (c) blue
22. 22.🌈 Which colour of light is strongest in rgb(196, 44, 42)? (a) green (b) blue (c) red
23. 23.🌈 Which colour is #000000? (a) blue (b) black (c) magenta (d) cyan
24. 24.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) Z (d) G
25. 25.🌈 Which colour is #ff00ff? (a) cyan (b) magenta (c) black (d) red
26. 26.🌈 Which hex code is cyan? (a) #00ffff (b) #00ff00 (c) #ffff00 (d) #ff00ff
27. 27.🌈 In #009700 the green part is the hex number 97. What is it as a normal number?
28. 28.🌈 In #290000 the red part is the hex number 29. What is it as a normal number?
29. 29.🌈 In #1e0000 the red part is the hex number 1e. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(175, 87, 69)? (a) red (b) blue (c) green
31. 31.🌈 Which colour of light is strongest in rgb(157, 20, 95)? (a) blue (b) green (c) red
32. 32.🌈 Which hex code is white? (a) #00ffff (b) #00ff00 (c) #ffffff (d) #ffff00
33. 33.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) red (c) bright green (d) yellow
34. 34.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) cyan (c) white (d) yellow
35. 35.🌈 Which colour of light is strongest in rgb(116, 81, 212)? (a) green (b) red (c) blue
36. 36.🌈 Which colour of light is strongest in rgb(139, 206, 58)? (a) green (b) blue (c) red
37. 37.🌈 Which colour of light is strongest in rgb(16, 71, 171)? (a) green (b) red (c) blue
38. 38.🌈 In #fe0000 the red part is the hex number fe. What is it as a normal number?
39. 39.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) yellow (c) red (d) blue
40. 40.🌈 In #002700 the green part is the hex number 27. What is it as a normal number?

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