CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 57 · 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 colour of light is strongest in rgb(243, 80, 121)? (a) red (b) green (c) blue
2. 2.🌈 In #008d00 the green part is the hex number 8d. What is it as a normal number?
3. 3.🌈 Which colour of light is strongest in rgb(195, 0, 122)? (a) red (b) green (c) blue
4. 4.🌈 Which colour is #00ffff? (a) magenta (b) bright green (c) cyan (d) black
5. 5.🌈 In #640000 the red part is the hex number 64. What is it as a normal number?
6. 6.🌈 Which hex code is cyan? (a) #000000 (b) #ffffff (c) #ff0000 (d) #00ffff
7. 7.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 6 (c) 2 (d) 4
8. 8.🌈 Which colour of light is strongest in rgb(81, 216, 117)? (a) blue (b) green (c) red
9. 9.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) blue (d) red
10. 10.🌈 Which hex code is yellow? (a) #ffffff (b) #ffff00 (c) #000000 (d) #ff00ff
11. 11.🌈 In #00002f the blue part is the hex number 2f. What is it as a normal number?
12. 12.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) cyan (c) white (d) bright green
13. 13.🌈 Which colour is #ffffff? (a) black (b) magenta (c) white (d) cyan
14. 14.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) red (d) blue
15. 15.🌈 In #d40000 the red part is the hex number d4. What is it as a normal number?
16. 16.🌈 In #0000e1 the blue part is the hex number e1. What is it as a normal number?
17. 17.🌈 Which hex code is magenta? (a) #ffffff (b) #0000ff (c) #ff00ff (d) #ff0000
18. 18.🌈 Which hex code is black? (a) #00ffff (b) #000000 (c) #00ff00 (d) #ff00ff
19. 19.🌈 Which colour is rgb(0, 255, 255)? (a) bright green (b) yellow (c) cyan (d) black
20. 20.🌈 In #0000fc the blue part is the hex number fc. What is it as a normal number?
21. 21.🌈 Which hex code is red? (a) #ffff00 (b) #ff00ff (c) #ff0000 (d) #0000ff
22. 22.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 99 (d) 255
23. 23.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) white (c) blue (d) black
24. 24.🌈 Which hex code is white? (a) #ffffff (b) #ff00ff (c) #000000 (d) #0000ff
25. 25.🌈 Which colour is #00ff00? (a) magenta (b) bright green (c) yellow (d) black
26. 26.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) cyan (c) bright green (d) magenta
27. 27.🌈 Which colour of light is strongest in rgb(72, 33, 211)? (a) green (b) red (c) blue
28. 28.🌈 Which colour is #000000? (a) bright green (b) blue (c) black (d) magenta
29. 29.🌈 Which colour is #ff00ff? (a) yellow (b) black (c) red (d) magenta
30. 30.🌈 Which colour is #ff0000? (a) bright green (b) black (c) red (d) white
31. 31.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) black (c) bright green (d) blue
32. 32.🌈 Which colour of light is strongest in rgb(33, 0, 161)? (a) green (b) blue (c) red
33. 33.🌈 Which colour of light is strongest in rgb(104, 73, 170)? (a) green (b) blue (c) red
34. 34.🌈 Which colour is rgb(0, 255, 0)? (a) magenta (b) bright green (c) black (d) yellow
35. 35.🌈 Which colour is #0000ff? (a) black (b) yellow (c) magenta (d) blue
36. 36.🌈 In #006b00 the green part is the hex number 6b. What is it as a normal number?
37. 37.🌈 Which colour is #ffff00? (a) bright green (b) white (c) yellow (d) black
38. 38.🌈 In #6c0000 the red part is the hex number 6c. What is it as a normal number?
39. 39.🌈 In #010000 the red part is the hex number 01. What is it as a normal number?
40. 40.🌈 In #df0000 the red part is the hex number df. What is it as a normal number?

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