CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 311 · 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 is #ff00ff? (a) white (b) cyan (c) magenta (d) blue
2. 2.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) red (c) bright green (d) black
3. 3.🌈 Which colour of light is strongest in rgb(78, 34, 237)? (a) red (b) blue (c) green
4. 4.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) cyan (c) white (d) black
5. 5.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 2 (c) 6 (d) 4
6. 6.🌈 Which colour is #00ffff? (a) red (b) magenta (c) cyan (d) bright green
7. 7.🌈 Which hex code is red? (a) #000000 (b) #00ff00 (c) #0000ff (d) #ff0000
8. 8.🌈 Which colour is #00ff00? (a) black (b) cyan (c) magenta (d) bright green
9. 9.🌈 Which colour of light is strongest in rgb(97, 21, 195)? (a) green (b) red (c) blue
10. 10.🌈 Which colour of light is strongest in rgb(62, 224, 74)? (a) blue (b) red (c) green
11. 11.🌈 Which hex code is magenta? (a) #0000ff (b) #ff00ff (c) #000000 (d) #00ffff
12. 12.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
13. 13.🌈 In #00002a the blue part is the hex number 2a. What is it as a normal number?
14. 14.🌈 In #cd0000 the red part is the hex number cd. What is it as a normal number?
15. 15.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) white (c) bright green (d) yellow
16. 16.🌈 In #d00000 the red part is the hex number d0. What is it as a normal number?
17. 17.🌈 Which hex code is cyan? (a) #00ffff (b) #000000 (c) #0000ff (d) #00ff00
18. 18.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) black (c) green (d) blue
19. 19.🌈 Which hex code is bright green? (a) #ff0000 (b) #00ffff (c) #0000ff (d) #00ff00
20. 20.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) cyan (c) magenta (d) white
21. 21.🌈 Which colour is #ffffff? (a) red (b) cyan (c) white (d) bright green
22. 22.🌈 Which colour of light is strongest in rgb(7, 242, 33)? (a) blue (b) red (c) green
23. 23.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) white (c) green (d) red
24. 24.🌈 Which colour is #ff0000? (a) red (b) bright green (c) black (d) blue
25. 25.🌈 Which hex code is white? (a) #ffff00 (b) #000000 (c) #ffffff (d) #ff0000
26. 26.🌈 Which hex code is black? (a) #ff00ff (b) #ffffff (c) #000000 (d) #00ff00
27. 27.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
28. 28.🌈 Which hex code is yellow? (a) #0000ff (b) #ffff00 (c) #ff0000 (d) #ff00ff
29. 29.🌈 In #002f00 the green part is the hex number 2f. What is it as a normal number?
30. 30.🌈 Which colour is #000000? (a) bright green (b) magenta (c) black (d) blue
31. 31.🌈 In #003100 the green part is the hex number 31. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(241, 139, 126)? (a) green (b) blue (c) red
33. 33.🌈 In #00af00 the green part is the hex number af. What is it as a normal number?
34. 34.🌈 Which colour of light is strongest in rgb(96, 216, 136)? (a) blue (b) green (c) red
35. 35.🌈 Which colour of light is strongest in rgb(13, 206, 40)? (a) blue (b) green (c) red
36. 36.🌈 Which colour of light is strongest in rgb(24, 29, 208)? (a) red (b) green (c) blue
37. 37.🌈 In #ae0000 the red part is the hex number ae. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(188, 9, 68)? (a) red (b) blue (c) green
39. 39.🌈 In #1e0000 the red part is the hex number 1e. What is it as a normal number?
40. 40.🌈 In #00009b the blue part is the hex number 9b. What is it as a normal number?

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