CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 133 · 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.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) white (d) red
2. 2.🌈 In #00c700 the green part is the hex number c7. What is it as a normal number?
3. 3.🌈 Which colour is #ff0000? (a) bright green (b) magenta (c) red (d) white
4. 4.🌈 Which hex code is magenta? (a) #ff00ff (b) #0000ff (c) #00ffff (d) #ffffff
5. 5.🌈 In #230000 the red part is the hex number 23. What is it as a normal number?
6. 6.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 255 (d) 100
7. 7.🌈 Which colour is #ff00ff? (a) blue (b) cyan (c) magenta (d) black
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) black (d) green
9. 9.🌈 In #0000c3 the blue part is the hex number c3. What is it as a normal number?
10. 10.🌈 In #00002e the blue part is the hex number 2e. What is it as a normal number?
11. 11.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) yellow (c) cyan (d) magenta
12. 12.🌈 In #ca0000 the red part is the hex number ca. What is it as a normal number?
13. 13.🌈 Which hex code is red? (a) #ff0000 (b) #00ffff (c) #0000ff (d) #000000
14. 14.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) yellow (c) magenta (d) red
15. 15.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) red (c) magenta (d) blue
16. 16.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 2 (d) 3
17. 17.🌈 Which colour of light is strongest in rgb(133, 183, 121)? (a) red (b) blue (c) green
18. 18.🌈 Which hex code is blue? (a) #00ff00 (b) #ffff00 (c) #ff0000 (d) #0000ff
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) yellow (c) magenta (d) bright green
20. 20.🌈 Which colour of light is strongest in rgb(171, 134, 97)? (a) red (b) blue (c) green
21. 21.🌈 Which colour is #ffff00? (a) red (b) white (c) yellow (d) bright green
22. 22.🌈 In #004c00 the green part is the hex number 4c. What is it as a normal number?
23. 23.🌈 In #0a0000 the red part is the hex number 0a. What is it as a normal number?
24. 24.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) white (c) magenta (d) black
25. 25.🌈 Which colour is #ffffff? (a) blue (b) magenta (c) white (d) yellow
26. 26.🌈 Which colour of light is strongest in rgb(49, 68, 166)? (a) blue (b) red (c) green
27. 27.🌈 Which colour of light is strongest in rgb(49, 99, 204)? (a) red (b) green (c) blue
28. 28.🌈 In #130000 the red part is the hex number 13. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(47, 47, 162)? (a) green (b) blue (c) red
30. 30.🌈 In #00be00 the green part is the hex number be. What is it as a normal number?
31. 31.🌈 In #a20000 the red part is the hex number a2. What is it as a normal number?
32. 32.🌈 Which colour is #00ff00? (a) bright green (b) white (c) black (d) blue
33. 33.🌈 Which colour is #0000ff? (a) bright green (b) yellow (c) blue (d) black
34. 34.🌈 In #0000ec the blue part is the hex number ec. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(157, 8, 33)? (a) blue (b) red (c) green
36. 36.🌈 Which hex code is yellow? (a) #00ffff (b) #ffffff (c) #ffff00 (d) #00ff00
37. 37.🌈 In #8e0000 the red part is the hex number 8e. What is it as a normal number?
38. 38.🌈 Which hex code is cyan? (a) #000000 (b) #ff0000 (c) #ffff00 (d) #00ffff
39. 39.🌈 Which colour of light is strongest in rgb(117, 229, 125)? (a) blue (b) red (c) green
40. 40.🌈 Which colour of light is strongest in rgb(104, 81, 229)? (a) red (b) green (c) blue

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