CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 218 · 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.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) white (c) magenta (d) cyan
2. 2.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) green (d) white
3. 3.🌈 Which hex code is yellow? (a) #00ffff (b) #ffff00 (c) #ff00ff (d) #ff0000
4. 4.🌈 Which colour is #ffff00? (a) white (b) cyan (c) yellow (d) red
5. 5.🌈 Which hex code is magenta? (a) #000000 (b) #0000ff (c) #ffffff (d) #ff00ff
6. 6.🌈 Which colour of light is strongest in rgb(53, 22, 243)? (a) green (b) red (c) blue
7. 7.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) green (c) red (d) blue
8. 8.🌈 Which colour is #ff0000? (a) blue (b) red (c) yellow (d) white
9. 9.🌈 Which colour is #00ff00? (a) red (b) blue (c) white (d) bright green
10. 10.🌈 Which hex code is red? (a) #00ff00 (b) #ff0000 (c) #0000ff (d) #000000
11. 11.🌈 Which colour of light is strongest in rgb(43, 20, 151)? (a) red (b) green (c) blue
12. 12.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) black (c) blue (d) yellow
13. 13.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) black (c) white (d) magenta
14. 14.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 2 (c) 3 (d) 4
15. 15.🌈 Which hex code is blue? (a) #0000ff (b) #ffffff (c) #00ff00 (d) #ff00ff
16. 16.🌈 Which colour is rgb(0, 0, 255)? (a) red (b) yellow (c) magenta (d) blue
17. 17.🌈 In #00c100 the green part is the hex number c1. What is it as a normal number?
18. 18.🌈 In #00b600 the green part is the hex number b6. What is it as a normal number?
19. 19.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) blue (c) cyan (d) red
20. 20.🌈 Which colour is #00ffff? (a) bright green (b) black (c) white (d) cyan
21. 21.🌈 Which hex code is cyan? (a) #ffff00 (b) #00ffff (c) #0000ff (d) #ffffff
22. 22.🌈 Which colour of light is strongest in rgb(26, 199, 95)? (a) blue (b) green (c) red
23. 23.🌈 Which colour is #000000? (a) red (b) white (c) blue (d) black
24. 24.🌈 Which colour of light is strongest in rgb(109, 169, 7)? (a) red (b) blue (c) green
25. 25.🌈 Which colour of light is strongest in rgb(93, 133, 230)? (a) blue (b) green (c) red
26. 26.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) F (d) J
27. 27.🌈 Which colour of light is strongest in rgb(91, 196, 137)? (a) red (b) blue (c) green
28. 28.🌈 Which colour of light is strongest in rgb(133, 66, 158)? (a) green (b) blue (c) red
29. 29.🌈 Which hex code is black? (a) #ffff00 (b) #0000ff (c) #000000 (d) #ff00ff
30. 30.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
31. 31.🌈 Which colour is #ff00ff? (a) red (b) white (c) blue (d) magenta
32. 32.🌈 In #150000 the red part is the hex number 15. What is it as a normal number?
33. 33.🌈 In #160000 the red part is the hex number 16. What is it as a normal number?
34. 34.🌈 In #000e00 the green part is the hex number 0e. What is it as a normal number?
35. 35.🌈 In #005b00 the green part is the hex number 5b. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(0, 154, 19)? (a) red (b) green (c) blue
37. 37.🌈 In #d70000 the red part is the hex number d7. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(152, 125, 38)? (a) blue (b) green (c) red
39. 39.🌈 In #0000d2 the blue part is the hex number d2. What is it as a normal number?
40. 40.🌈 Which colour is rgb(0, 255, 0)? (a) magenta (b) bright green (c) cyan (d) red

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