CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 294 · 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 black? (a) #ff00ff (b) #00ffff (c) #ff0000 (d) #000000
2. 2.🌈 Which hex code is magenta? (a) #00ff00 (b) #0000ff (c) #ffff00 (d) #ff00ff
3. 3.🌈 Which hex code is blue? (a) #ff0000 (b) #ff00ff (c) #0000ff (d) #ffffff
4. 4.🌈 In #0000cd the blue part is the hex number cd. What is it as a normal number?
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
6. 6.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ffff (c) #ff0000 (d) #00ff00
7. 7.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
8. 8.🌈 Which colour is #0000ff? (a) magenta (b) cyan (c) white (d) blue
9. 9.🌈 In #a70000 the red part is the hex number a7. What is it as a normal number?
10. 10.🌈 In #a30000 the red part is the hex number a3. What is it as a normal number?
11. 11.🌈 Which colour of light is strongest in rgb(221, 18, 34)? (a) blue (b) red (c) green
12. 12.🌈 Which colour of light is strongest in rgb(73, 201, 21)? (a) red (b) green (c) blue
13. 13.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 255 (c) 99 (d) 1000
14. 14.🌈 Which colour is #ffff00? (a) blue (b) yellow (c) bright green (d) cyan
15. 15.🌈 Which colour of light is strongest in rgb(94, 219, 74)? (a) green (b) blue (c) red
16. 16.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) magenta (c) cyan (d) bright green
17. 17.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) blue (c) red (d) yellow
18. 18.🌈 Which colour is #00ff00? (a) bright green (b) magenta (c) red (d) blue
19. 19.🌈 Which hex code is cyan? (a) #ffff00 (b) #0000ff (c) #00ffff (d) #000000
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) green (d) black
21. 21.🌈 Which colour of light is strongest in rgb(166, 7, 107)? (a) red (b) blue (c) green
22. 22.🌈 Which colour is #ff00ff? (a) white (b) yellow (c) bright green (d) magenta
23. 23.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) red (c) cyan (d) white
24. 24.🌈 Which colour of light is strongest in rgb(151, 133, 106)? (a) green (b) blue (c) red
25. 25.🌈 Which colour of light is strongest in rgb(75, 180, 26)? (a) blue (b) red (c) green
26. 26.🌈 Which hex code is white? (a) #ff00ff (b) #0000ff (c) #00ff00 (d) #ffffff
27. 27.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) blue (c) yellow (d) red
28. 28.🌈 Which colour of light is strongest in rgb(224, 127, 29)? (a) green (b) blue (c) red
29. 29.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) F (c) G (d) J
30. 30.🌈 Which hex code is yellow? (a) #ff0000 (b) #ff00ff (c) #ffff00 (d) #000000
31. 31.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) red (c) yellow (d) cyan
32. 32.🌈 Which colour of light is strongest in rgb(42, 210, 48)? (a) green (b) red (c) blue
33. 33.🌈 Which colour of light is strongest in rgb(17, 10, 180)? (a) red (b) green (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(250, 112, 15)? (a) green (b) red (c) blue
35. 35.🌈 Which colour is #00ffff? (a) bright green (b) white (c) cyan (d) blue
36. 36.🌈 Which colour of light is strongest in rgb(123, 210, 95)? (a) green (b) red (c) blue
37. 37.🌈 In #000024 the blue part is the hex number 24. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(117, 24, 201)? (a) blue (b) red (c) green
39. 39.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) black (c) bright green (d) blue
40. 40.🌈 Which colour is #ff0000? (a) yellow (b) black (c) bright green (d) red

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