CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 25 · 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 colour of light is strongest in rgb(92, 196, 60)? (a) red (b) green (c) blue
2. 2.🌈 Which colour is rgb(255, 255, 255)? (a) magenta (b) white (c) black (d) yellow
3. 3.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) yellow (c) bright green (d) white
4. 4.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) J (d) G
5. 5.🌈 Which colour is #ffffff? (a) blue (b) red (c) white (d) black
6. 6.🌈 Which colour of light is strongest in rgb(132, 174, 18)? (a) red (b) green (c) blue
7. 7.🌈 Which colour of light is strongest in rgb(73, 57, 174)? (a) blue (b) red (c) green
8. 8.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) yellow (c) bright green (d) cyan
9. 9.🌈 Which hex code is white? (a) #000000 (b) #ffffff (c) #00ffff (d) #00ff00
10. 10.🌈 In #590000 the red part is the hex number 59. What is it as a normal number?
11. 11.🌈 Which colour is #00ffff? (a) white (b) bright green (c) yellow (d) cyan
12. 12.🌈 In #310000 the red part is the hex number 31. What is it as a normal number?
13. 13.🌈 Which colour of light is strongest in rgb(128, 240, 69)? (a) blue (b) red (c) green
14. 14.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) green (d) blue
15. 15.🌈 Which colour of light is strongest in rgb(157, 60, 81)? (a) red (b) green (c) blue
16. 16.🌈 Which hex code is bright green? (a) #ff0000 (b) #ff00ff (c) #ffffff (d) #00ff00
17. 17.🌈 In #d00000 the red part is the hex number d0. What is it as a normal number?
18. 18.🌈 Which colour is #0000ff? (a) magenta (b) red (c) black (d) blue
19. 19.🌈 In #000053 the blue part is the hex number 53. What is it as a normal number?
20. 20.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 100 (d) 255
21. 21.🌈 Which colour of light is strongest in rgb(222, 115, 106)? (a) green (b) blue (c) red
22. 22.🌈 Which colour of light is strongest in rgb(115, 218, 32)? (a) red (b) blue (c) green
23. 23.🌈 Which hex code is cyan? (a) #000000 (b) #ffffff (c) #00ffff (d) #00ff00
24. 24.🌈 Which colour is #ff00ff? (a) blue (b) black (c) magenta (d) red
25. 25.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) blue (c) green (d) red
26. 26.🌈 Which hex code is yellow? (a) #ffff00 (b) #00ffff (c) #00ff00 (d) #ff00ff
27. 27.🌈 In #450000 the red part is the hex number 45. What is it as a normal number?
28. 28.🌈 Which hex code is red? (a) #ffff00 (b) #ff0000 (c) #00ffff (d) #ffffff
29. 29.🌈 Which colour of light is strongest in rgb(137, 9, 247)? (a) green (b) red (c) blue
30. 30.🌈 In #00d400 the green part is the hex number d4. What is it as a normal number?
31. 31.🌈 In #0000cb the blue part is the hex number cb. What is it as a normal number?
32. 32.🌈 In #b50000 the red part is the hex number b5. What is it as a normal number?
33. 33.🌈 Which colour is rgb(0, 0, 255)? (a) cyan (b) blue (c) red (d) yellow
34. 34.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) magenta (c) bright green (d) cyan
35. 35.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) cyan (c) blue (d) yellow
36. 36.🌈 In #010000 the red part is the hex number 01. What is it as a normal number?
37. 37.🌈 In #000013 the blue part is the hex number 13. What is it as a normal number?
38. 38.🌈 Which colour is #000000? (a) bright green (b) black (c) blue (d) yellow
39. 39.🌈 In #00000d the blue part is the hex number 0d. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(252, 27, 25)? (a) blue (b) green (c) red

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