CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 266 · 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 yellow? (a) #000000 (b) #ffff00 (c) #0000ff (d) #ff0000
2. 2.🌈 Which hex code is magenta? (a) #ff00ff (b) #00ffff (c) #00ff00 (d) #ffff00
3. 3.🌈 Which colour is #00ff00? (a) yellow (b) white (c) bright green (d) red
4. 4.🌈 Which hex code is cyan? (a) #ffff00 (b) #00ffff (c) #0000ff (d) #ff00ff
5. 5.🌈 Which colour of light is strongest in rgb(248, 47, 33)? (a) green (b) blue (c) red
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 6 (d) 3
7. 7.🌈 Which hex code is white? (a) #0000ff (b) #ff0000 (c) #00ffff (d) #ffffff
8. 8.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) black (c) bright green (d) red
9. 9.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) red (d) blue
10. 10.🌈 Which colour is #ff0000? (a) bright green (b) red (c) blue (d) cyan
11. 11.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) J (d) G
12. 12.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) white (c) black (d) cyan
13. 13.🌈 In #1e0000 the red part is the hex number 1e. What is it as a normal number?
14. 14.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) bright green (c) yellow (d) black
15. 15.🌈 In #0000a9 the blue part is the hex number a9. What is it as a normal number?
16. 16.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 1000 (d) 100
17. 17.🌈 Which colour is rgb(255, 255, 255)? (a) cyan (b) blue (c) bright green (d) white
18. 18.🌈 Which colour of light is strongest in rgb(54, 186, 45)? (a) red (b) green (c) blue
19. 19.🌈 Which colour is #000000? (a) cyan (b) black (c) blue (d) white
20. 20.🌈 Which hex code is blue? (a) #0000ff (b) #ff00ff (c) #00ff00 (d) #000000
21. 21.🌈 Which colour of light is strongest in rgb(118, 188, 15)? (a) blue (b) red (c) green
22. 22.🌈 Which colour is #ff00ff? (a) yellow (b) white (c) cyan (d) magenta
23. 23.🌈 Which colour of light is strongest in rgb(52, 159, 102)? (a) green (b) blue (c) red
24. 24.🌈 Which colour of light is strongest in rgb(104, 85, 156)? (a) green (b) red (c) blue
25. 25.🌈 In #060000 the red part is the hex number 06. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(208, 108, 131)? (a) red (b) green (c) blue
27. 27.🌈 Which colour of light is strongest in rgb(8, 224, 134)? (a) green (b) red (c) blue
28. 28.🌈 Which colour is #0000ff? (a) cyan (b) blue (c) black (d) magenta
29. 29.🌈 Which colour is #ffffff? (a) blue (b) red (c) cyan (d) white
30. 30.🌈 Which colour is #00ffff? (a) black (b) red (c) cyan (d) blue
31. 31.🌈 Which colour of light is strongest in rgb(97, 62, 193)? (a) green (b) red (c) blue
32. 32.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) white (d) red
33. 33.🌈 Which colour is rgb(0, 0, 255)? (a) yellow (b) blue (c) red (d) cyan
34. 34.🌈 In #530000 the red part is the hex number 53. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(202, 116, 131)? (a) red (b) blue (c) green
36. 36.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) black (c) cyan (d) red
37. 37.🌈 In #960000 the red part is the hex number 96. What is it as a normal number?
38. 38.🌈 In #008700 the green part is the hex number 87. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(16, 180, 30)? (a) red (b) green (c) blue
40. 40.🌈 In #000097 the blue part is the hex number 97. What is it as a normal number?

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