CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 77 · 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.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 255 (c) 1000 (d) 99
2. 2.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
3. 3.🌈 Which colour of light is strongest in rgb(171, 112, 28)? (a) green (b) blue (c) red
4. 4.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) green (c) blue (d) red
5. 5.🌈 Which colour of light is strongest in rgb(35, 209, 94)? (a) blue (b) green (c) red
6. 6.🌈 Which colour is #ffffff? (a) white (b) cyan (c) yellow (d) black
7. 7.🌈 Which colour is #ff0000? (a) black (b) cyan (c) red (d) magenta
8. 8.🌈 Which colour is #0000ff? (a) blue (b) black (c) bright green (d) magenta
9. 9.🌈 In #004a00 the green part is the hex number 4a. What is it as a normal number?
10. 10.🌈 Which hex code is black? (a) #00ff00 (b) #ff00ff (c) #000000 (d) #ff0000
11. 11.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) white (c) yellow (d) blue
12. 12.🌈 Which colour is #00ff00? (a) black (b) bright green (c) white (d) blue
13. 13.🌈 Which colour is #ff00ff? (a) magenta (b) blue (c) yellow (d) black
14. 14.🌈 Which colour is #00ffff? (a) black (b) cyan (c) blue (d) yellow
15. 15.🌈 Which colour is rgb(0, 0, 255)? (a) yellow (b) bright green (c) magenta (d) blue
16. 16.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 2 (c) 6 (d) 4
17. 17.🌈 In #000098 the blue part is the hex number 98. What is it as a normal number?
18. 18.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) J (c) G (d) F
19. 19.🌈 Which colour of light is strongest in rgb(126, 166, 111)? (a) red (b) green (c) blue
20. 20.🌈 Which colour is #ffff00? (a) yellow (b) white (c) cyan (d) magenta
21. 21.🌈 In #00009c the blue part is the hex number 9c. What is it as a normal number?
22. 22.🌈 Which colour of light is strongest in rgb(127, 177, 101)? (a) red (b) blue (c) green
23. 23.🌈 In #be0000 the red part is the hex number be. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(187, 65, 123)? (a) red (b) green (c) blue
25. 25.🌈 In #0000e9 the blue part is the hex number e9. What is it as a normal number?
26. 26.🌈 In #007f00 the green part is the hex number 7f. What is it as a normal number?
27. 27.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) black (c) red (d) bright green
28. 28.🌈 Which hex code is cyan? (a) #00ffff (b) #ffff00 (c) #ff00ff (d) #ff0000
29. 29.🌈 Which colour of light is strongest in rgb(37, 231, 22)? (a) blue (b) green (c) red
30. 30.🌈 Which colour of light is strongest in rgb(38, 20, 192)? (a) green (b) blue (c) red
31. 31.🌈 In #00e000 the green part is the hex number e0. What is it as a normal number?
32. 32.🌈 Which colour is rgb(255, 255, 0)? (a) cyan (b) yellow (c) blue (d) white
33. 33.🌈 Which colour of light is strongest in rgb(79, 246, 114)? (a) blue (b) green (c) red
34. 34.🌈 In #e00000 the red part is the hex number e0. What is it as a normal number?
35. 35.🌈 Which colour is #000000? (a) white (b) red (c) black (d) cyan
36. 36.🌈 Which colour of light is strongest in rgb(40, 254, 5)? (a) green (b) blue (c) red
37. 37.🌈 In #840000 the red part is the hex number 84. What is it as a normal number?
38. 38.🌈 Which hex code is bright green? (a) #00ff00 (b) #ff0000 (c) #000000 (d) #ffff00
39. 39.🌈 In #000082 the blue part is the hex number 82. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(40, 239, 64)? (a) green (b) blue (c) red

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