CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 71 · 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 #rrggbb, which colour do the first two digits give? (a) green (b) red (c) blue (d) black
2. 2.🌈 Which colour of light is strongest in rgb(150, 131, 108)? (a) blue (b) red (c) green
3. 3.🌈 Which colour is #ff00ff? (a) cyan (b) red (c) yellow (d) magenta
4. 4.🌈 Which colour of light is strongest in rgb(32, 176, 0)? (a) blue (b) red (c) green
5. 5.🌈 Which hex code is magenta? (a) #00ff00 (b) #000000 (c) #ff0000 (d) #ff00ff
6. 6.🌈 Which colour is #ffff00? (a) yellow (b) black (c) blue (d) red
7. 7.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 2 (d) 3
8. 8.🌈 Which hex code is white? (a) #000000 (b) #00ff00 (c) #ff0000 (d) #ffffff
9. 9.🌈 Which hex code is blue? (a) #00ff00 (b) #00ffff (c) #ffffff (d) #0000ff
10. 10.🌈 Which hex code is bright green? (a) #000000 (b) #00ffff (c) #00ff00 (d) #ffffff
11. 11.🌈 In #6d0000 the red part is the hex number 6d. What is it as a normal number?
12. 12.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) white (d) red
13. 13.🌈 Which colour is #ff0000? (a) cyan (b) yellow (c) red (d) white
14. 14.🌈 Which hex code is yellow? (a) #000000 (b) #ffffff (c) #0000ff (d) #ffff00
15. 15.🌈 In #200000 the red part is the hex number 20. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(233, 123, 139)? (a) blue (b) red (c) green
17. 17.🌈 Which colour is #0000ff? (a) yellow (b) blue (c) bright green (d) black
18. 18.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) red (c) black (d) bright green
19. 19.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) red (c) blue (d) black
20. 20.🌈 Which colour of light is strongest in rgb(233, 130, 38)? (a) red (b) green (c) blue
21. 21.🌈 Which colour is #00ff00? (a) red (b) cyan (c) white (d) bright green
22. 22.🌈 In #470000 the red part is the hex number 47. What is it as a normal number?
23. 23.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 255 (c) 99 (d) 100
24. 24.🌈 In #007800 the green part is the hex number 78. What is it as a normal number?
25. 25.🌈 Which hex code is cyan? (a) #00ff00 (b) #00ffff (c) #ff0000 (d) #ffffff
26. 26.🌈 In #0c0000 the red part is the hex number 0c. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(152, 47, 129)? (a) blue (b) green (c) red
28. 28.🌈 In #180000 the red part is the hex number 18. What is it as a normal number?
29. 29.🌈 In #00006f the blue part is the hex number 6f. What is it as a normal number?
30. 30.🌈 Which hex code is red? (a) #ff00ff (b) #00ffff (c) #0000ff (d) #ff0000
31. 31.🌈 Which colour of light is strongest in rgb(38, 235, 83)? (a) green (b) red (c) blue
32. 32.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) Z (d) G
33. 33.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) black (c) bright green (d) red
34. 34.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) cyan (c) yellow (d) bright green
35. 35.🌈 In #940000 the red part is the hex number 94. What is it as a normal number?
36. 36.🌈 In #000013 the blue part is the hex number 13. What is it as a normal number?
37. 37.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) magenta (c) black (d) yellow
38. 38.🌈 In #160000 the red part is the hex number 16. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(166, 79, 17)? (a) blue (b) green (c) red
40. 40.🌈 In #a10000 the red part is the hex number a1. What is it as a normal number?

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