CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 205 · 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 hex code is bright green? (a) #ff0000 (b) #ff00ff (c) #0000ff (d) #00ff00
2. 2.🌈 Which colour is #ffffff? (a) bright green (b) cyan (c) white (d) red
3. 3.🌈 Which colour of light is strongest in rgb(73, 214, 121)? (a) blue (b) green (c) red
4. 4.🌈 Which hex code is cyan? (a) #ffff00 (b) #00ffff (c) #0000ff (d) #00ff00
5. 5.🌈 Which colour is #ffff00? (a) red (b) yellow (c) cyan (d) white
6. 6.🌈 Which hex code is black? (a) #ffffff (b) #0000ff (c) #ff00ff (d) #000000
7. 7.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) blue (c) red (d) black
8. 8.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) white (c) magenta (d) cyan
9. 9.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 255 (d) 99
10. 10.🌈 Which colour is #000000? (a) yellow (b) bright green (c) cyan (d) black
11. 11.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) green (c) blue (d) red
12. 12.🌈 Which colour is #00ff00? (a) black (b) blue (c) bright green (d) yellow
13. 13.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) yellow (c) blue (d) cyan
14. 14.🌈 Which colour is #00ffff? (a) cyan (b) white (c) red (d) black
15. 15.🌈 In #000021 the blue part is the hex number 21. What is it as a normal number?
16. 16.🌈 Which colour is #0000ff? (a) black (b) blue (c) cyan (d) red
17. 17.🌈 Which colour of light is strongest in rgb(200, 40, 11)? (a) red (b) green (c) blue
18. 18.🌈 Which colour of light is strongest in rgb(196, 13, 140)? (a) red (b) green (c) blue
19. 19.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
20. 20.🌈 Which colour of light is strongest in rgb(168, 25, 86)? (a) red (b) blue (c) green
21. 21.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) bright green (c) magenta (d) white
22. 22.🌈 In #00f700 the green part is the hex number f7. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(12, 160, 43)? (a) blue (b) red (c) green
24. 24.🌈 In #960000 the red part is the hex number 96. What is it as a normal number?
25. 25.🌈 Which hex code is blue? (a) #0000ff (b) #00ffff (c) #00ff00 (d) #ffffff
26. 26.🌈 Which colour is #ff0000? (a) black (b) magenta (c) bright green (d) red
27. 27.🌈 Which colour of light is strongest in rgb(24, 161, 29)? (a) blue (b) red (c) green
28. 28.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) Z (d) F
29. 29.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) yellow (c) bright green (d) black
30. 30.🌈 Which colour of light is strongest in rgb(114, 183, 101)? (a) green (b) red (c) blue
31. 31.🌈 In #00ea00 the green part is the hex number ea. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(169, 77, 0)? (a) green (b) blue (c) red
33. 33.🌈 Which colour of light is strongest in rgb(40, 83, 204)? (a) red (b) blue (c) green
34. 34.🌈 In #000035 the blue part is the hex number 35. What is it as a normal number?
35. 35.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) white (c) black (d) red
36. 36.🌈 Which hex code is red? (a) #ffff00 (b) #ffffff (c) #ff0000 (d) #00ffff
37. 37.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) yellow (c) bright green (d) blue
38. 38.🌈 In #0000fc the blue part is the hex number fc. What is it as a normal number?
39. 39.🌈 In #00c100 the green part is the hex number c1. What is it as a normal number?
40. 40.🌈 In #f00000 the red part is the hex number f0. What is it as a normal number?

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