CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 226 · 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) 99 (c) 1000 (d) 255
2. 2.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 2 (d) 3
3. 3.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) magenta (c) bright green (d) red
4. 4.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) black (c) bright green (d) blue
5. 5.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) blue (c) white (d) red
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) red (c) blue (d) white
7. 7.🌈 Which colour is #ffffff? (a) yellow (b) red (c) white (d) magenta
8. 8.🌈 Which hex code is yellow? (a) #00ffff (b) #ffff00 (c) #00ff00 (d) #000000
9. 9.🌈 In #004d00 the green part is the hex number 4d. What is it as a normal number?
10. 10.🌈 Which colour of light is strongest in rgb(169, 10, 29)? (a) red (b) green (c) blue
11. 11.🌈 Which colour is #ffff00? (a) yellow (b) black (c) blue (d) bright green
12. 12.🌈 Which hex code is magenta? (a) #00ff00 (b) #ff00ff (c) #ffffff (d) #ffff00
13. 13.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) blue (d) red
14. 14.🌈 Which colour of light is strongest in rgb(118, 39, 188)? (a) green (b) red (c) blue
15. 15.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) G (d) Z
16. 16.🌈 Which colour is #ff0000? (a) cyan (b) red (c) magenta (d) black
17. 17.🌈 Which colour is #000000? (a) magenta (b) black (c) yellow (d) blue
18. 18.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) black (c) yellow (d) magenta
19. 19.🌈 Which hex code is red? (a) #000000 (b) #00ff00 (c) #ff0000 (d) #ffffff
20. 20.🌈 In #0000e7 the blue part is the hex number e7. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(30, 210, 94)? (a) blue (b) green (c) red
22. 22.🌈 In #00000d the blue part is the hex number 0d. What is it as a normal number?
23. 23.🌈 Which colour is #0000ff? (a) red (b) black (c) blue (d) yellow
24. 24.🌈 In #002600 the green part is the hex number 26. What is it as a normal number?
25. 25.🌈 In #830000 the red part is the hex number 83. What is it as a normal number?
26. 26.🌈 In #4e0000 the red part is the hex number 4e. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(39, 35, 160)? (a) blue (b) red (c) green
28. 28.🌈 Which hex code is black? (a) #000000 (b) #ff00ff (c) #00ffff (d) #00ff00
29. 29.🌈 Which hex code is bright green? (a) #ffff00 (b) #ff0000 (c) #00ffff (d) #00ff00
30. 30.🌈 In #0000e5 the blue part is the hex number e5. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(20, 117, 169)? (a) blue (b) green (c) red
32. 32.🌈 Which colour of light is strongest in rgb(6, 216, 24)? (a) green (b) red (c) blue
33. 33.🌈 Which colour of light is strongest in rgb(58, 163, 32)? (a) red (b) blue (c) green
34. 34.🌈 In #8c0000 the red part is the hex number 8c. What is it as a normal number?
35. 35.🌈 Which colour is #ff00ff? (a) red (b) blue (c) magenta (d) bright green
36. 36.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #00ff00 (d) #ffffff
37. 37.🌈 Which hex code is cyan? (a) #0000ff (b) #ffffff (c) #00ffff (d) #000000
38. 38.🌈 In #2c0000 the red part is the hex number 2c. What is it as a normal number?
39. 39.🌈 Which colour is #00ff00? (a) bright green (b) white (c) yellow (d) red
40. 40.🌈 Which colour of light is strongest in rgb(84, 59, 195)? (a) blue (b) green (c) red

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