CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 308 · 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) #0000ff (b) #ffff00 (c) #ff0000 (d) #00ffff
2. 2.🌈 Which colour is #00ff00? (a) yellow (b) black (c) red (d) bright green
3. 3.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) yellow (c) blue (d) white
4. 4.🌈 Which colour of light is strongest in rgb(61, 11, 253)? (a) green (b) red (c) blue
5. 5.🌈 Which colour of light is strongest in rgb(186, 49, 28)? (a) red (b) blue (c) green
6. 6.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) white (c) magenta (d) bright green
7. 7.🌈 Which colour of light is strongest in rgb(31, 192, 17)? (a) blue (b) green (c) red
8. 8.🌈 In #000010 the blue part is the hex number 10. What is it as a normal number?
9. 9.🌈 Which hex code is red? (a) #ff00ff (b) #000000 (c) #00ffff (d) #ff0000
10. 10.🌈 Which colour of light is strongest in rgb(11, 129, 153)? (a) blue (b) red (c) green
11. 11.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) Z (d) G
12. 12.🌈 Which colour of light is strongest in rgb(57, 188, 43)? (a) blue (b) red (c) green
13. 13.🌈 Which colour is #ffff00? (a) blue (b) bright green (c) red (d) yellow
14. 14.🌈 Which colour is #00ffff? (a) black (b) red (c) blue (d) cyan
15. 15.🌈 In #620000 the red part is the hex number 62. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(152, 24, 19)? (a) red (b) blue (c) green
17. 17.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 4 (c) 6 (d) 2
18. 18.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) black (d) green
19. 19.🌈 Which colour is #0000ff? (a) black (b) red (c) blue (d) cyan
20. 20.🌈 In #00005b the blue part is the hex number 5b. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(245, 106, 95)? (a) green (b) blue (c) red
22. 22.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) green (d) blue
23. 23.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) white (c) yellow (d) magenta
24. 24.🌈 In #4b0000 the red part is the hex number 4b. What is it as a normal number?
25. 25.🌈 In #00dc00 the green part is the hex number dc. What is it as a normal number?
26. 26.🌈 Which colour is #ffffff? (a) yellow (b) black (c) white (d) blue
27. 27.🌈 Which hex code is magenta? (a) #ffffff (b) #ff00ff (c) #00ff00 (d) #ff0000
28. 28.🌈 In #0000fd the blue part is the hex number fd. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(172, 6, 76)? (a) blue (b) red (c) green
30. 30.🌈 Which hex code is cyan? (a) #00ffff (b) #ff0000 (c) #0000ff (d) #ffffff
31. 31.🌈 Which colour is #ff0000? (a) bright green (b) red (c) black (d) cyan
32. 32.🌈 Which colour of light is strongest in rgb(122, 99, 176)? (a) red (b) blue (c) green
33. 33.🌈 In #000021 the blue part is the hex number 21. What is it as a normal number?
34. 34.🌈 Which colour of light is strongest in rgb(12, 100, 224)? (a) green (b) red (c) blue
35. 35.🌈 In #003c00 the green part is the hex number 3c. What is it as a normal number?
36. 36.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
37. 37.🌈 Which colour of light is strongest in rgb(115, 117, 164)? (a) green (b) red (c) blue
38. 38.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) yellow (c) bright green (d) cyan
39. 39.🌈 In #470000 the red part is the hex number 47. What is it as a normal number?
40. 40.🌈 In #00006d the blue part is the hex number 6d. What is it as a normal number?

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