CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 172 · 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.🌈 In #00d700 the green part is the hex number d7. What is it as a normal number?
2. 2.🌈 In #00002e the blue part is the hex number 2e. What is it as a normal number?
3. 3.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) blue (c) cyan (d) bright green
4. 4.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) bright green (c) blue (d) black
5. 5.🌈 Which colour is #00ffff? (a) blue (b) bright green (c) magenta (d) cyan
6. 6.🌈 In #00009a the blue part is the hex number 9a. What is it as a normal number?
7. 7.🌈 Which hex code is cyan? (a) #00ffff (b) #ffffff (c) #ff00ff (d) #0000ff
8. 8.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ffff (c) #ffffff (d) #00ff00
9. 9.🌈 In #5b0000 the red part is the hex number 5b. What is it as a normal number?
10. 10.🌈 Which colour of light is strongest in rgb(131, 76, 183)? (a) red (b) green (c) blue
11. 11.🌈 Which colour is #0000ff? (a) white (b) blue (c) bright green (d) black
12. 12.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 100 (d) 99
13. 13.🌈 In #cb0000 the red part is the hex number cb. What is it as a normal number?
14. 14.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) G (d) Z
15. 15.🌈 Which hex code is white? (a) #ff0000 (b) #ffff00 (c) #0000ff (d) #ffffff
16. 16.🌈 Which colour of light is strongest in rgb(22, 160, 130)? (a) red (b) green (c) blue
17. 17.🌈 Which colour of light is strongest in rgb(210, 54, 70)? (a) blue (b) green (c) red
18. 18.🌈 Which colour is #ffff00? (a) cyan (b) red (c) white (d) yellow
19. 19.🌈 Which colour is #00ff00? (a) bright green (b) yellow (c) magenta (d) cyan
20. 20.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) red (c) yellow (d) blue
21. 21.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) green (d) black
22. 22.🌈 Which colour of light is strongest in rgb(77, 37, 189)? (a) green (b) blue (c) red
23. 23.🌈 In #000022 the blue part is the hex number 22. What is it as a normal number?
24. 24.🌈 In #a80000 the red part is the hex number a8. What is it as a normal number?
25. 25.🌈 Which colour is rgb(0, 0, 0)? (a) yellow (b) bright green (c) black (d) cyan
26. 26.🌈 Which colour is rgb(255, 255, 255)? (a) magenta (b) blue (c) white (d) bright green
27. 27.🌈 Which colour of light is strongest in rgb(9, 104, 159)? (a) blue (b) red (c) green
28. 28.🌈 In #00ad00 the green part is the hex number ad. What is it as a normal number?
29. 29.🌈 Which hex code is red? (a) #0000ff (b) #00ff00 (c) #ffff00 (d) #ff0000
30. 30.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) magenta (c) red (d) black
31. 31.🌈 Which colour of light is strongest in rgb(51, 197, 74)? (a) red (b) blue (c) green
32. 32.🌈 Which colour is #000000? (a) red (b) white (c) cyan (d) black
33. 33.🌈 Which colour is #ff0000? (a) red (b) black (c) cyan (d) magenta
34. 34.🌈 Which colour of light is strongest in rgb(167, 114, 30)? (a) red (b) green (c) blue
35. 35.🌈 In #0000e9 the blue part is the hex number e9. What is it as a normal number?
36. 36.🌈 Which colour is #ff00ff? (a) black (b) bright green (c) magenta (d) blue
37. 37.🌈 In #c90000 the red part is the hex number c9. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(174, 32, 86)? (a) blue (b) red (c) green
39. 39.🌈 Which hex code is black? (a) #00ff00 (b) #ffffff (c) #000000 (d) #ffff00
40. 40.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) green (d) white

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