CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 141 · 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) 1000 (b) 99 (c) 255 (d) 100
2. 2.🌈 Which hex code is magenta? (a) #000000 (b) #ffff00 (c) #ff0000 (d) #ff00ff
3. 3.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) red (d) black
4. 4.🌈 Which colour of light is strongest in rgb(206, 6, 104)? (a) red (b) blue (c) green
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) green (c) blue (d) red
6. 6.🌈 Which hex code is bright green? (a) #ffff00 (b) #0000ff (c) #ffffff (d) #00ff00
7. 7.🌈 Which colour is rgb(255, 0, 0)? (a) magenta (b) white (c) yellow (d) red
8. 8.🌈 In #550000 the red part is the hex number 55. What is it as a normal number?
9. 9.🌈 Which hex code is red? (a) #ff00ff (b) #000000 (c) #ff0000 (d) #ffffff
10. 10.🌈 Which colour is rgb(0, 0, 255)? (a) cyan (b) magenta (c) white (d) blue
11. 11.🌈 Which hex code is black? (a) #ffff00 (b) #000000 (c) #00ffff (d) #ff0000
12. 12.🌈 Which colour is #00ff00? (a) yellow (b) bright green (c) magenta (d) white
13. 13.🌈 Which colour of light is strongest in rgb(121, 246, 127)? (a) red (b) blue (c) green
14. 14.🌈 In #bb0000 the red part is the hex number bb. What is it as a normal number?
15. 15.🌈 Which hex code is white? (a) #00ff00 (b) #ffff00 (c) #0000ff (d) #ffffff
16. 16.🌈 In #002300 the green part is the hex number 23. What is it as a normal number?
17. 17.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) blue (c) black (d) white
18. 18.🌈 In #000008 the blue part is the hex number 08. What is it as a normal number?
19. 19.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) blue (c) red (d) yellow
20. 20.🌈 Which colour is #ff00ff? (a) white (b) black (c) magenta (d) blue
21. 21.🌈 Which colour is #000000? (a) black (b) yellow (c) blue (d) red
22. 22.🌈 Which colour is #ffffff? (a) white (b) black (c) blue (d) bright green
23. 23.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) blue (c) white (d) bright green
24. 24.🌈 Which colour of light is strongest in rgb(22, 90, 216)? (a) red (b) green (c) blue
25. 25.🌈 Which colour of light is strongest in rgb(5, 190, 123)? (a) blue (b) green (c) red
26. 26.🌈 Which colour of light is strongest in rgb(131, 214, 47)? (a) green (b) red (c) blue
27. 27.🌈 In #d50000 the red part is the hex number d5. What is it as a normal number?
28. 28.🌈 In #eb0000 the red part is the hex number eb. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(181, 76, 118)? (a) red (b) green (c) blue
30. 30.🌈 Which hex code is blue? (a) #0000ff (b) #ff0000 (c) #ffffff (d) #00ffff
31. 31.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 3 (d) 4
32. 32.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) red (c) white (d) black
33. 33.🌈 In #640000 the red part is the hex number 64. What is it as a normal number?
34. 34.🌈 Which colour is #00ffff? (a) cyan (b) bright green (c) red (d) magenta
35. 35.🌈 Which colour is #ffff00? (a) blue (b) bright green (c) magenta (d) yellow
36. 36.🌈 In #000f00 the green part is the hex number 0f. What is it as a normal number?
37. 37.🌈 In #000072 the blue part is the hex number 72. What is it as a normal number?
38. 38.🌈 In #00b900 the green part is the hex number b9. What is it as a normal number?
39. 39.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) F (d) Z
40. 40.🌈 Which colour of light is strongest in rgb(160, 96, 122)? (a) blue (b) red (c) green

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