CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 48 · 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.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) F (d) J
2. 2.🌈 Which colour is #ffff00? (a) white (b) yellow (c) bright green (d) black
3. 3.🌈 Which colour is #ff00ff? (a) magenta (b) bright green (c) cyan (d) red
4. 4.🌈 Which colour is #ff0000? (a) yellow (b) blue (c) red (d) black
5. 5.🌈 In #004a00 the green part is the hex number 4a. What is it as a normal number?
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
7. 7.🌈 Which colour of light is strongest in rgb(205, 13, 91)? (a) red (b) blue (c) green
8. 8.🌈 Which colour is rgb(255, 255, 255)? (a) cyan (b) white (c) red (d) magenta
9. 9.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 1000 (d) 100
10. 10.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) black (d) blue
11. 11.🌈 Which hex code is cyan? (a) #ff0000 (b) #ffffff (c) #00ffff (d) #00ff00
12. 12.🌈 In #000022 the blue part is the hex number 22. What is it as a normal number?
13. 13.🌈 Which colour is #00ffff? (a) blue (b) magenta (c) cyan (d) yellow
14. 14.🌈 Which hex code is yellow? (a) #ffff00 (b) #00ff00 (c) #00ffff (d) #ffffff
15. 15.🌈 Which colour of light is strongest in rgb(49, 153, 70)? (a) blue (b) red (c) green
16. 16.🌈 In #006100 the green part is the hex number 61. What is it as a normal number?
17. 17.🌈 Which colour of light is strongest in rgb(132, 140, 226)? (a) red (b) blue (c) green
18. 18.🌈 In #730000 the red part is the hex number 73. What is it as a normal number?
19. 19.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 6 (d) 3
20. 20.🌈 Which colour is rgb(255, 255, 0)? (a) blue (b) magenta (c) yellow (d) bright green
21. 21.🌈 Which hex code is white? (a) #ffffff (b) #ffff00 (c) #000000 (d) #0000ff
22. 22.🌈 Which colour is #000000? (a) red (b) yellow (c) blue (d) black
23. 23.🌈 Which colour of light is strongest in rgb(205, 36, 105)? (a) red (b) blue (c) green
24. 24.🌈 In #1c0000 the red part is the hex number 1c. What is it as a normal number?
25. 25.🌈 In #0000e8 the blue part is the hex number e8. What is it as a normal number?
26. 26.🌈 In #230000 the red part is the hex number 23. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(118, 247, 4)? (a) blue (b) green (c) red
28. 28.🌈 Which colour of light is strongest in rgb(6, 219, 137)? (a) green (b) blue (c) red
29. 29.🌈 Which hex code is magenta? (a) #ffff00 (b) #00ffff (c) #ff00ff (d) #0000ff
30. 30.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) bright green (c) blue (d) white
31. 31.🌈 Which colour of light is strongest in rgb(136, 121, 151)? (a) red (b) blue (c) green
32. 32.🌈 Which colour is #00ff00? (a) cyan (b) bright green (c) red (d) blue
33. 33.🌈 Which colour of light is strongest in rgb(36, 234, 40)? (a) green (b) red (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(44, 107, 163)? (a) green (b) blue (c) red
35. 35.🌈 In #000029 the blue part is the hex number 29. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(70, 103, 192)? (a) red (b) green (c) blue
37. 37.🌈 Which colour of light is strongest in rgb(231, 48, 1)? (a) blue (b) red (c) green
38. 38.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) cyan (c) magenta (d) yellow
39. 39.🌈 In #00d900 the green part is the hex number d9. What is it as a normal number?
40. 40.🌈 In #3f0000 the red part is the hex number 3f. What is it as a normal number?

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