CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 324 · 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 #ffffff? (a) cyan (b) bright green (c) white (d) magenta
2. 2.🌈 Which colour is #ff00ff? (a) blue (b) magenta (c) cyan (d) red
3. 3.🌈 Which colour is #00ffff? (a) cyan (b) yellow (c) white (d) magenta
4. 4.🌈 Which colour is #0000ff? (a) bright green (b) white (c) blue (d) magenta
5. 5.🌈 Which colour of light is strongest in rgb(98, 83, 234)? (a) green (b) red (c) blue
6. 6.🌈 Which hex code is bright green? (a) #ffffff (b) #ffff00 (c) #00ff00 (d) #0000ff
7. 7.🌈 Which hex code is red? (a) #ff00ff (b) #00ff00 (c) #ff0000 (d) #000000
8. 8.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) blue (c) cyan (d) black
9. 9.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) bright green (c) black (d) white
10. 10.🌈 In #00005f the blue part is the hex number 5f. What is it as a normal number?
11. 11.🌈 Which hex code is cyan? (a) #000000 (b) #00ffff (c) #0000ff (d) #ff0000
12. 12.🌈 Which colour is #ffff00? (a) red (b) bright green (c) yellow (d) blue
13. 13.🌈 In #00008f the blue part is the hex number 8f. What is it as a normal number?
14. 14.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) yellow (c) bright green (d) black
15. 15.🌈 In #00d100 the green part is the hex number d1. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(30, 28, 236)? (a) green (b) red (c) blue
17. 17.🌈 Which colour of light is strongest in rgb(61, 231, 12)? (a) blue (b) red (c) green
18. 18.🌈 Which colour is rgb(255, 0, 0)? (a) yellow (b) red (c) black (d) white
19. 19.🌈 Which hex code is black? (a) #ffff00 (b) #0000ff (c) #000000 (d) #00ff00
20. 20.🌈 In #8f0000 the red part is the hex number 8f. What is it as a normal number?
21. 21.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 255 (c) 99 (d) 1000
22. 22.🌈 In #00d300 the green part is the hex number d3. What is it as a normal number?
23. 23.🌈 In #7c0000 the red part is the hex number 7c. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(15, 31, 197)? (a) green (b) blue (c) red
25. 25.🌈 Which colour of light is strongest in rgb(31, 229, 25)? (a) blue (b) red (c) green
26. 26.🌈 In #008d00 the green part is the hex number 8d. What is it as a normal number?
27. 27.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 4 (c) 2 (d) 3
28. 28.🌈 In #000075 the blue part is the hex number 75. What is it as a normal number?
29. 29.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) yellow (c) magenta (d) bright green
30. 30.🌈 Which colour is #00ff00? (a) blue (b) yellow (c) bright green (d) magenta
31. 31.🌈 Which colour of light is strongest in rgb(30, 9, 175)? (a) blue (b) green (c) red
32. 32.🌈 Which colour is #ff0000? (a) black (b) white (c) yellow (d) red
33. 33.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) black (d) blue
34. 34.🌈 Which colour of light is strongest in rgb(202, 68, 25)? (a) red (b) green (c) blue
35. 35.🌈 Which hex code is blue? (a) #ffffff (b) #0000ff (c) #ff00ff (d) #00ff00
36. 36.🌈 Which hex code is yellow? (a) #000000 (b) #00ff00 (c) #0000ff (d) #ffff00
37. 37.🌈 In #002800 the green part is the hex number 28. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(65, 233, 101)? (a) green (b) blue (c) red
39. 39.🌈 In #0000b5 the blue part is the hex number b5. What is it as a normal number?
40. 40.🌈 In #004c00 the green part is the hex number 4c. What is it as a normal number?

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