CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 31 · 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 of light is strongest in rgb(11, 168, 104)? (a) green (b) red (c) blue
2. 2.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 99 (c) 1000 (d) 255
3. 3.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) bright green (c) red (d) black
4. 4.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) yellow (c) bright green (d) white
5. 5.🌈 Which colour of light is strongest in rgb(175, 14, 29)? (a) green (b) red (c) blue
6. 6.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) red (d) black
7. 7.🌈 Which colour is #0000ff? (a) magenta (b) red (c) blue (d) white
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) white (d) red
9. 9.🌈 Which hex code is magenta? (a) #000000 (b) #0000ff (c) #ff0000 (d) #ff00ff
10. 10.🌈 In #120000 the red part is the hex number 12. What is it as a normal number?
11. 11.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) blue (c) yellow (d) red
12. 12.🌈 Which colour is #00ffff? (a) black (b) cyan (c) white (d) bright green
13. 13.🌈 In #007c00 the green part is the hex number 7c. What is it as a normal number?
14. 14.🌈 Which colour of light is strongest in rgb(199, 75, 65)? (a) blue (b) red (c) green
15. 15.🌈 Which colour of light is strongest in rgb(157, 32, 15)? (a) blue (b) green (c) red
16. 16.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) J (d) F
17. 17.🌈 Which hex code is yellow? (a) #ffff00 (b) #00ff00 (c) #0000ff (d) #00ffff
18. 18.🌈 Which colour is #ffff00? (a) bright green (b) yellow (c) black (d) red
19. 19.🌈 Which colour is #ffffff? (a) white (b) red (c) bright green (d) blue
20. 20.🌈 Which colour of light is strongest in rgb(230, 97, 33)? (a) red (b) green (c) blue
21. 21.🌈 Which colour of light is strongest in rgb(72, 62, 232)? (a) blue (b) green (c) red
22. 22.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #00ff00 (d) #ff00ff
23. 23.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 2 (c) 3 (d) 6
24. 24.🌈 Which colour is #ff0000? (a) yellow (b) blue (c) bright green (d) red
25. 25.🌈 Which hex code is cyan? (a) #ff0000 (b) #ffffff (c) #000000 (d) #00ffff
26. 26.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) bright green (c) white (d) blue
27. 27.🌈 Which colour of light is strongest in rgb(69, 50, 162)? (a) red (b) green (c) blue
28. 28.🌈 Which hex code is red? (a) #00ffff (b) #ffffff (c) #ff0000 (d) #00ff00
29. 29.🌈 Which colour of light is strongest in rgb(255, 130, 103)? (a) blue (b) red (c) green
30. 30.🌈 Which colour of light is strongest in rgb(150, 101, 134)? (a) blue (b) red (c) green
31. 31.🌈 In #00ab00 the green part is the hex number ab. What is it as a normal number?
32. 32.🌈 Which hex code is bright green? (a) #00ff00 (b) #ffff00 (c) #ffffff (d) #00ffff
33. 33.🌈 Which colour is #ff00ff? (a) white (b) bright green (c) red (d) magenta
34. 34.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) black (c) bright green (d) magenta
35. 35.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) yellow (c) magenta (d) white
36. 36.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) yellow (c) red (d) magenta
37. 37.🌈 Which colour of light is strongest in rgb(184, 102, 51)? (a) red (b) green (c) blue
38. 38.🌈 Which colour is rgb(255, 0, 255)? (a) bright green (b) black (c) yellow (d) magenta
39. 39.🌈 In #000b00 the green part is the hex number 0b. What is it as a normal number?
40. 40.🌈 In #0e0000 the red part is the hex number 0e. What is it as a normal number?

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