CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 206 · 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 #a90000 the red part is the hex number a9. What is it as a normal number?
2. 2.🌈 Which hex code is magenta? (a) #ffff00 (b) #ff00ff (c) #0000ff (d) #ffffff
3. 3.🌈 In #140000 the red part is the hex number 14. What is it as a normal number?
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 6 (c) 2 (d) 4
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) white (d) red
6. 6.🌈 Which colour of light is strongest in rgb(171, 21, 111)? (a) green (b) blue (c) red
7. 7.🌈 In #0000a8 the blue part is the hex number a8. What is it as a normal number?
8. 8.🌈 In #00006d the blue part is the hex number 6d. What is it as a normal number?
9. 9.🌈 Which hex code is red? (a) #000000 (b) #ff0000 (c) #00ffff (d) #00ff00
10. 10.🌈 In #230000 the red part is the hex number 23. What is it as a normal number?
11. 11.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) yellow (c) black (d) bright green
12. 12.🌈 Which colour is #000000? (a) blue (b) cyan (c) black (d) yellow
13. 13.🌈 Which colour of light is strongest in rgb(236, 123, 84)? (a) green (b) blue (c) red
14. 14.🌈 Which colour is rgb(0, 0, 255)? (a) black (b) bright green (c) red (d) blue
15. 15.🌈 Which colour is #0000ff? (a) cyan (b) black (c) white (d) blue
16. 16.🌈 In #00000b the blue part is the hex number 0b. What is it as a normal number?
17. 17.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
18. 18.🌈 In #00001a the blue part is the hex number 1a. What is it as a normal number?
19. 19.🌈 In #00006a the blue part is the hex number 6a. What is it as a normal number?
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) blue (d) black
21. 21.🌈 Which colour of light is strongest in rgb(6, 22, 238)? (a) red (b) blue (c) green
22. 22.🌈 Which colour is #ff0000? (a) bright green (b) magenta (c) red (d) yellow
23. 23.🌈 Which colour of light is strongest in rgb(245, 120, 97)? (a) red (b) blue (c) green
24. 24.🌈 In #3c0000 the red part is the hex number 3c. What is it as a normal number?
25. 25.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) cyan (c) yellow (d) red
26. 26.🌈 Which colour is #ff00ff? (a) black (b) yellow (c) magenta (d) white
27. 27.🌈 Which colour of light is strongest in rgb(138, 14, 154)? (a) blue (b) red (c) green
28. 28.🌈 Which colour is rgb(255, 255, 0)? (a) blue (b) cyan (c) yellow (d) black
29. 29.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) yellow (c) magenta (d) black
30. 30.🌈 In #000700 the green part is the hex number 07. What is it as a normal number?
31. 31.🌈 Which colour is #00ffff? (a) magenta (b) white (c) cyan (d) yellow
32. 32.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) G (d) J
33. 33.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) cyan (c) black (d) red
34. 34.🌈 In #000007 the blue part is the hex number 07. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(120, 1, 203)? (a) blue (b) green (c) red
36. 36.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) bright green (c) cyan (d) white
37. 37.🌈 In #580000 the red part is the hex number 58. What is it as a normal number?
38. 38.🌈 Which colour is #ffff00? (a) red (b) bright green (c) yellow (d) white
39. 39.🌈 Which hex code is cyan? (a) #00ff00 (b) #ffffff (c) #00ffff (d) #ff0000
40. 40.🌈 In #002700 the green part is the hex number 27. What is it as a normal number?

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