CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 366 · 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 last two digits give? (a) red (b) green (c) white (d) blue
2. 2.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ff00 (c) #ff00ff (d) #ff0000
3. 3.🌈 Which colour is #ff0000? (a) black (b) yellow (c) red (d) blue
4. 4.🌈 Which colour is #000000? (a) black (b) cyan (c) red (d) bright green
5. 5.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) J (d) F
6. 6.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) yellow (c) bright green (d) white
7. 7.🌈 In #6e0000 the red part is the hex number 6e. What is it as a normal number?
8. 8.🌈 In #00008c the blue part is the hex number 8c. What is it as a normal number?
9. 9.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) blue (c) black (d) red
10. 10.🌈 Which colour of light is strongest in rgb(174, 16, 31)? (a) blue (b) red (c) green
11. 11.🌈 Which colour of light is strongest in rgb(108, 158, 19)? (a) blue (b) green (c) red
12. 12.🌈 Which hex code is white? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ff0000
13. 13.🌈 Which colour is #00ff00? (a) bright green (b) black (c) blue (d) yellow
14. 14.🌈 Which colour of light is strongest in rgb(79, 17, 249)? (a) red (b) green (c) blue
15. 15.🌈 Which hex code is blue? (a) #00ff00 (b) #ffffff (c) #ffff00 (d) #0000ff
16. 16.🌈 Which colour is #00ffff? (a) cyan (b) blue (c) red (d) yellow
17. 17.🌈 Which colour of light is strongest in rgb(15, 219, 107)? (a) blue (b) red (c) green
18. 18.🌈 Which colour is #ffff00? (a) yellow (b) white (c) bright green (d) red
19. 19.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 99 (c) 255 (d) 1000
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) black (d) green
21. 21.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) cyan (c) bright green (d) red
22. 22.🌈 In #0000d3 the blue part is the hex number d3. What is it as a normal number?
23. 23.🌈 Which colour is #ffffff? (a) cyan (b) white (c) magenta (d) red
24. 24.🌈 Which hex code is magenta? (a) #00ff00 (b) #0000ff (c) #ffffff (d) #ff00ff
25. 25.🌈 In #250000 the red part is the hex number 25. What is it as a normal number?
26. 26.🌈 Which hex code is yellow? (a) #ffffff (b) #0000ff (c) #ffff00 (d) #ff00ff
27. 27.🌈 In #00c500 the green part is the hex number c5. What is it as a normal number?
28. 28.🌈 Which colour of light is strongest in rgb(193, 115, 20)? (a) blue (b) green (c) red
29. 29.🌈 Which colour is #ff00ff? (a) black (b) magenta (c) yellow (d) bright green
30. 30.🌈 In #aa0000 the red part is the hex number aa. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(238, 24, 48)? (a) red (b) green (c) blue
32. 32.🌈 In #00c300 the green part is the hex number c3. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(8, 195, 10)? (a) green (b) red (c) blue
34. 34.🌈 In #000091 the blue part is the hex number 91. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(173, 108, 70)? (a) blue (b) green (c) red
36. 36.🌈 In #00a100 the green part is the hex number a1. What is it as a normal number?
37. 37.🌈 Which hex code is cyan? (a) #ffffff (b) #0000ff (c) #ff00ff (d) #00ffff
38. 38.🌈 In #4e0000 the red part is the hex number 4e. What is it as a normal number?
39. 39.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 3 (d) 6
40. 40.🌈 In #540000 the red part is the hex number 54. What is it as a normal number?

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