CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 132 · 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(27, 67, 220)? (a) red (b) green (c) blue
2. 2.🌈 Which colour of light is strongest in rgb(175, 76, 13)? (a) blue (b) red (c) green
3. 3.🌈 Which colour of light is strongest in rgb(132, 210, 130)? (a) red (b) blue (c) green
4. 4.🌈 In #000049 the blue part is the hex number 49. What is it as a normal number?
5. 5.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) black (d) green
6. 6.🌈 Which colour is #000000? (a) red (b) black (c) white (d) yellow
7. 7.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) bright green (c) white (d) yellow
8. 8.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) bright green (c) red (d) black
9. 9.🌈 Which colour of light is strongest in rgb(64, 110, 192)? (a) green (b) blue (c) red
10. 10.🌈 Which hex code is white? (a) #ffffff (b) #00ffff (c) #ff0000 (d) #ff00ff
11. 11.🌈 Which colour is #00ffff? (a) red (b) cyan (c) black (d) bright green
12. 12.🌈 Which colour of light is strongest in rgb(28, 58, 213)? (a) blue (b) red (c) green
13. 13.🌈 Which colour of light is strongest in rgb(228, 129, 49)? (a) blue (b) red (c) green
14. 14.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) yellow (c) red (d) white
15. 15.🌈 In #0000cd the blue part is the hex number cd. What is it as a normal number?
16. 16.🌈 In #0000e0 the blue part is the hex number e0. What is it as a normal number?
17. 17.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) cyan (c) magenta (d) red
18. 18.🌈 Which colour is #ffffff? (a) white (b) yellow (c) bright green (d) magenta
19. 19.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 3 (d) 2
20. 20.🌈 Which hex code is magenta? (a) #ff0000 (b) #ff00ff (c) #000000 (d) #00ffff
21. 21.🌈 Which hex code is blue? (a) #0000ff (b) #00ffff (c) #ffffff (d) #ff0000
22. 22.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) red (c) bright green (d) cyan
23. 23.🌈 Which hex code is bright green? (a) #00ff00 (b) #000000 (c) #ff0000 (d) #ffffff
24. 24.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
25. 25.🌈 Which colour is #ff0000? (a) white (b) magenta (c) bright green (d) red
26. 26.🌈 Which colour is #0000ff? (a) bright green (b) cyan (c) red (d) blue
27. 27.🌈 Which hex code is red? (a) #0000ff (b) #ffffff (c) #00ffff (d) #ff0000
28. 28.🌈 Which colour of light is strongest in rgb(15, 238, 77)? (a) red (b) blue (c) green
29. 29.🌈 In #000003 the blue part is the hex number 03. What is it as a normal number?
30. 30.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 100 (d) 1000
31. 31.🌈 Which colour of light is strongest in rgb(22, 109, 229)? (a) green (b) blue (c) red
32. 32.🌈 In #000075 the blue part is the hex number 75. What is it as a normal number?
33. 33.🌈 In #040000 the red part is the hex number 04. What is it as a normal number?
34. 34.🌈 Which colour of light is strongest in rgb(126, 25, 171)? (a) green (b) blue (c) red
35. 35.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) red (c) black (d) yellow
36. 36.🌈 In #5e0000 the red part is the hex number 5e. What is it as a normal number?
37. 37.🌈 Which hex code is yellow? (a) #0000ff (b) #ffff00 (c) #00ff00 (d) #00ffff
38. 38.🌈 Which colour is #00ff00? (a) bright green (b) black (c) blue (d) white
39. 39.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) yellow (c) bright green (d) black
40. 40.🌈 Which colour is #ff00ff? (a) blue (b) yellow (c) red (d) magenta

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