CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 135 · 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 is rgb(255, 0, 255)? (a) white (b) magenta (c) red (d) yellow
2. 2.🌈 Which hex code is black? (a) #ffffff (b) #0000ff (c) #000000 (d) #00ff00
3. 3.🌈 Which hex code is white? (a) #ffff00 (b) #ff00ff (c) #ff0000 (d) #ffffff
4. 4.🌈 Which colour of light is strongest in rgb(151, 123, 135)? (a) green (b) red (c) blue
5. 5.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) yellow (c) bright green (d) red
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) white (d) red
7. 7.🌈 Which colour is #ff0000? (a) red (b) cyan (c) blue (d) yellow
8. 8.🌈 In #5c0000 the red part is the hex number 5c. What is it as a normal number?
9. 9.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) blue (c) yellow (d) red
10. 10.🌈 In #004600 the green part is the hex number 46. What is it as a normal number?
11. 11.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) magenta (c) yellow (d) black
12. 12.🌈 In #000044 the blue part is the hex number 44. What is it as a normal number?
13. 13.🌈 In #00006c the blue part is the hex number 6c. What is it as a normal number?
14. 14.🌈 Which colour is #00ff00? (a) cyan (b) red (c) bright green (d) magenta
15. 15.🌈 Which colour is #ffffff? (a) magenta (b) blue (c) black (d) white
16. 16.🌈 In #002800 the green part is the hex number 28. What is it as a normal number?
17. 17.🌈 In #0000f0 the blue part is the hex number f0. What is it as a normal number?
18. 18.🌈 In #da0000 the red part is the hex number da. What is it as a normal number?
19. 19.🌈 Which hex code is yellow? (a) #ffffff (b) #0000ff (c) #00ffff (d) #ffff00
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) black (d) red
21. 21.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 255 (d) 99
22. 22.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
23. 23.🌈 Which colour is #00ffff? (a) magenta (b) yellow (c) white (d) cyan
24. 24.🌈 Which colour of light is strongest in rgb(179, 12, 78)? (a) red (b) green (c) blue
25. 25.🌈 Which hex code is blue? (a) #00ff00 (b) #ffff00 (c) #000000 (d) #0000ff
26. 26.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) bright green (c) magenta (d) white
27. 27.🌈 Which hex code is magenta? (a) #00ffff (b) #00ff00 (c) #ff00ff (d) #ff0000
28. 28.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) white (c) cyan (d) bright green
29. 29.🌈 Which colour of light is strongest in rgb(24, 59, 235)? (a) red (b) blue (c) green
30. 30.🌈 Which colour of light is strongest in rgb(229, 17, 92)? (a) red (b) green (c) blue
31. 31.🌈 In #600000 the red part is the hex number 60. What is it as a normal number?
32. 32.🌈 In #000097 the blue part is the hex number 97. What is it as a normal number?
33. 33.🌈 In #3e0000 the red part is the hex number 3e. What is it as a normal number?
34. 34.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) magenta (c) red (d) cyan
35. 35.🌈 Which colour of light is strongest in rgb(110, 252, 22)? (a) green (b) blue (c) red
36. 36.🌈 Which colour of light is strongest in rgb(6, 70, 227)? (a) green (b) blue (c) red
37. 37.🌈 Which colour is #000000? (a) black (b) cyan (c) white (d) yellow
38. 38.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) F (c) G (d) J
39. 39.🌈 Which colour of light is strongest in rgb(180, 16, 63)? (a) blue (b) red (c) green
40. 40.🌈 Which colour of light is strongest in rgb(60, 209, 51)? (a) green (b) blue (c) red

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