CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 331 · 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.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) Z (d) J
2. 2.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) cyan (c) blue (d) bright green
3. 3.🌈 Which colour is #ffff00? (a) black (b) magenta (c) bright green (d) yellow
4. 4.🌈 In #004a00 the green part is the hex number 4a. What is it as a normal number?
5. 5.🌈 Which colour is rgb(255, 0, 255)? (a) red (b) bright green (c) magenta (d) white
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 6 (d) 3
7. 7.🌈 Which colour is #00ff00? (a) blue (b) magenta (c) bright green (d) red
8. 8.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) bright green (c) magenta (d) yellow
9. 9.🌈 Which hex code is bright green? (a) #00ff00 (b) #ff0000 (c) #ff00ff (d) #000000
10. 10.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) blue (d) green
11. 11.🌈 Which colour is #00ffff? (a) bright green (b) red (c) white (d) cyan
12. 12.🌈 Which hex code is cyan? (a) #ffff00 (b) #000000 (c) #00ffff (d) #00ff00
13. 13.🌈 Which hex code is magenta? (a) #ffffff (b) #ffff00 (c) #000000 (d) #ff00ff
14. 14.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
15. 15.🌈 In #0000d9 the blue part is the hex number d9. What is it as a normal number?
16. 16.🌈 Which hex code is red? (a) #ff0000 (b) #ffffff (c) #ff00ff (d) #ffff00
17. 17.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) blue (c) red (d) cyan
18. 18.🌈 Which colour is #0000ff? (a) white (b) black (c) blue (d) red
19. 19.🌈 Which hex code is white? (a) #00ff00 (b) #0000ff (c) #00ffff (d) #ffffff
20. 20.🌈 Which colour is #000000? (a) magenta (b) red (c) black (d) yellow
21. 21.🌈 In #002a00 the green part is the hex number 2a. What is it as a normal number?
22. 22.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #ff00ff (d) #ffffff
23. 23.🌈 Which colour of light is strongest in rgb(46, 48, 187)? (a) red (b) green (c) blue
24. 24.🌈 Which hex code is black? (a) #00ff00 (b) #0000ff (c) #000000 (d) #ff0000
25. 25.🌈 In #002800 the green part is the hex number 28. What is it as a normal number?
26. 26.🌈 Which colour is #ff0000? (a) cyan (b) black (c) blue (d) red
27. 27.🌈 Which colour of light is strongest in rgb(14, 197, 35)? (a) red (b) blue (c) green
28. 28.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) yellow (c) cyan (d) red
29. 29.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) magenta (c) red (d) black
30. 30.🌈 In #000040 the blue part is the hex number 40. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(118, 1, 194)? (a) red (b) green (c) blue
32. 32.🌈 Which colour of light is strongest in rgb(140, 215, 32)? (a) red (b) green (c) blue
33. 33.🌈 Which colour of light is strongest in rgb(111, 33, 232)? (a) green (b) red (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(43, 176, 45)? (a) green (b) red (c) blue
35. 35.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 99 (c) 100 (d) 1000
36. 36.🌈 Which colour of light is strongest in rgb(174, 97, 30)? (a) green (b) red (c) blue
37. 37.🌈 In #004000 the green part is the hex number 40. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(215, 18, 86)? (a) blue (b) green (c) red
39. 39.🌈 Which colour of light is strongest in rgb(218, 8, 117)? (a) red (b) green (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(170, 136, 43)? (a) blue (b) green (c) red

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