CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 76 · 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) 99 (b) 255 (c) 1000 (d) 100
2. 2.🌈 Which colour of light is strongest in rgb(127, 119, 202)? (a) green (b) blue (c) red
3. 3.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green
4. 4.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) black (c) bright green (d) blue
5. 5.🌈 In #000028 the blue part is the hex number 28. What is it as a normal number?
6. 6.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) blue (d) black
7. 7.🌈 Which colour is #ffffff? (a) yellow (b) bright green (c) white (d) red
8. 8.🌈 In #000036 the blue part is the hex number 36. What is it as a normal number?
9. 9.🌈 Which hex code is white? (a) #ffff00 (b) #ff00ff (c) #ff0000 (d) #ffffff
10. 10.🌈 In #090000 the red part is the hex number 09. What is it as a normal number?
11. 11.🌈 In #006700 the green part is the hex number 67. What is it as a normal number?
12. 12.🌈 In #7e0000 the red part is the hex number 7e. What is it as a normal number?
13. 13.🌈 Which hex code is red? (a) #ff0000 (b) #0000ff (c) #ffff00 (d) #00ffff
14. 14.🌈 Which hex code is cyan? (a) #00ffff (b) #ff0000 (c) #0000ff (d) #00ff00
15. 15.🌈 Which colour is #00ff00? (a) bright green (b) blue (c) magenta (d) red
16. 16.🌈 Which hex code is bright green? (a) #ff0000 (b) #000000 (c) #ffffff (d) #00ff00
17. 17.🌈 In #004f00 the green part is the hex number 4f. What is it as a normal number?
18. 18.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) cyan (c) magenta (d) black
19. 19.🌈 Which colour of light is strongest in rgb(185, 50, 59)? (a) red (b) blue (c) green
20. 20.🌈 In #ef0000 the red part is the hex number ef. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(154, 133, 42)? (a) red (b) blue (c) green
22. 22.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 3 (c) 6 (d) 2
23. 23.🌈 In #003000 the green part is the hex number 30. What is it as a normal number?
24. 24.🌈 Which colour is #0000ff? (a) magenta (b) white (c) yellow (d) blue
25. 25.🌈 Which colour is #ff00ff? (a) white (b) bright green (c) cyan (d) magenta
26. 26.🌈 In #990000 the red part is the hex number 99. What is it as a normal number?
27. 27.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) red (c) white (d) yellow
28. 28.🌈 In #002100 the green part is the hex number 21. What is it as a normal number?
29. 29.🌈 In #fb0000 the red part is the hex number fb. What is it as a normal number?
30. 30.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) red (c) bright green (d) magenta
31. 31.🌈 In #d40000 the red part is the hex number d4. What is it as a normal number?
32. 32.🌈 In #b20000 the red part is the hex number b2. What is it as a normal number?
33. 33.🌈 Which colour is #ffff00? (a) cyan (b) black (c) yellow (d) bright green
34. 34.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) magenta (c) bright green (d) cyan
35. 35.🌈 Which hex code is yellow? (a) #0000ff (b) #ffff00 (c) #00ff00 (d) #000000
36. 36.🌈 In #d10000 the red part is the hex number d1. What is it as a normal number?
37. 37.🌈 In #000077 the blue part is the hex number 77. What is it as a normal number?
38. 38.🌈 Which hex code is magenta? (a) #ff00ff (b) #ff0000 (c) #ffffff (d) #0000ff
39. 39.🌈 In #00b600 the green part is the hex number b6. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(78, 39, 167)? (a) blue (b) green (c) red

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