CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 261 · 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 magenta? (a) #ff0000 (b) #0000ff (c) #ff00ff (d) #ffff00
2. 2.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 6 (d) 4
3. 3.🌈 Which colour is #ff0000? (a) red (b) blue (c) yellow (d) magenta
4. 4.🌈 Which colour is #ffffff? (a) bright green (b) cyan (c) black (d) white
5. 5.🌈 In #ad0000 the red part is the hex number ad. What is it as a normal number?
6. 6.🌈 Which hex code is red? (a) #ffffff (b) #00ff00 (c) #ff0000 (d) #0000ff
7. 7.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) black (c) cyan (d) magenta
8. 8.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
9. 9.🌈 Which colour of light is strongest in rgb(122, 22, 183)? (a) green (b) blue (c) red
10. 10.🌈 Which colour of light is strongest in rgb(95, 166, 130)? (a) blue (b) red (c) green
11. 11.🌈 Which colour is #ffff00? (a) blue (b) yellow (c) bright green (d) cyan
12. 12.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) white (c) blue (d) black
13. 13.🌈 Which colour is #00ff00? (a) blue (b) bright green (c) red (d) cyan
14. 14.🌈 Which colour of light is strongest in rgb(1, 206, 106)? (a) red (b) blue (c) green
15. 15.🌈 Which hex code is cyan? (a) #ffffff (b) #00ffff (c) #00ff00 (d) #ff00ff
16. 16.🌈 Which hex code is bright green? (a) #0000ff (b) #00ff00 (c) #ff00ff (d) #00ffff
17. 17.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) red (c) black (d) blue
18. 18.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) red (d) green
19. 19.🌈 Which colour is #0000ff? (a) black (b) blue (c) yellow (d) magenta
20. 20.🌈 In #00cb00 the green part is the hex number cb. What is it as a normal number?
21. 21.🌈 In #280000 the red part is the hex number 28. What is it as a normal number?
22. 22.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) black (c) yellow (d) magenta
23. 23.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) bright green (c) magenta (d) white
24. 24.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) J (d) F
25. 25.🌈 Which colour is #00ffff? (a) white (b) bright green (c) magenta (d) cyan
26. 26.🌈 Which colour of light is strongest in rgb(68, 43, 206)? (a) blue (b) green (c) red
27. 27.🌈 In #7d0000 the red part is the hex number 7d. What is it as a normal number?
28. 28.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) magenta (c) bright green (d) red
29. 29.🌈 Which colour of light is strongest in rgb(240, 56, 82)? (a) green (b) red (c) blue
30. 30.🌈 Which colour is #000000? (a) cyan (b) black (c) blue (d) magenta
31. 31.🌈 Which colour of light is strongest in rgb(218, 103, 23)? (a) green (b) red (c) blue
32. 32.🌈 In #006d00 the green part is the hex number 6d. What is it as a normal number?
33. 33.🌈 Which colour is #ff00ff? (a) magenta (b) white (c) black (d) bright green
34. 34.🌈 Which colour of light is strongest in rgb(59, 137, 151)? (a) red (b) green (c) blue
35. 35.🌈 Which colour of light is strongest in rgb(232, 23, 131)? (a) red (b) blue (c) green
36. 36.🌈 Which colour of light is strongest in rgb(54, 119, 200)? (a) red (b) green (c) blue
37. 37.🌈 In #00c900 the green part is the hex number c9. What is it as a normal number?
38. 38.🌈 In #000091 the blue part is the hex number 91. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(53, 119, 214)? (a) green (b) red (c) blue
40. 40.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green

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