CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 79 · 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.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 100 (d) 99
2. 2.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) red (c) bright green (d) magenta
3. 3.🌈 Which hex code is yellow? (a) #ffffff (b) #000000 (c) #ff00ff (d) #ffff00
4. 4.🌈 Which colour of light is strongest in rgb(26, 95, 247)? (a) blue (b) red (c) green
5. 5.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) green (c) red (d) blue
6. 6.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) J (d) F
7. 7.🌈 In #3e0000 the red part is the hex number 3e. What is it as a normal number?
8. 8.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) bright green (c) black (d) magenta
9. 9.🌈 Which colour is rgb(0, 0, 255)? (a) cyan (b) black (c) blue (d) red
10. 10.🌈 Which colour of light is strongest in rgb(130, 93, 194)? (a) red (b) blue (c) green
11. 11.🌈 Which colour of light is strongest in rgb(254, 59, 116)? (a) green (b) blue (c) red
12. 12.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) red (c) green (d) black
13. 13.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 4 (d) 6
14. 14.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) white (c) blue (d) yellow
15. 15.🌈 In #008c00 the green part is the hex number 8c. What is it as a normal number?
16. 16.🌈 Which colour is #ffff00? (a) red (b) black (c) yellow (d) white
17. 17.🌈 In #2c0000 the red part is the hex number 2c. What is it as a normal number?
18. 18.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) magenta (c) red (d) bright green
19. 19.🌈 Which hex code is black? (a) #00ffff (b) #ff0000 (c) #000000 (d) #ff00ff
20. 20.🌈 Which colour is #00ffff? (a) cyan (b) red (c) bright green (d) black
21. 21.🌈 In #790000 the red part is the hex number 79. What is it as a normal number?
22. 22.🌈 Which colour is #ff0000? (a) magenta (b) red (c) cyan (d) white
23. 23.🌈 Which colour of light is strongest in rgb(14, 54, 241)? (a) red (b) green (c) blue
24. 24.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) white (c) black (d) red
25. 25.🌈 Which colour of light is strongest in rgb(88, 139, 238)? (a) green (b) blue (c) red
26. 26.🌈 Which hex code is magenta? (a) #ff00ff (b) #ff0000 (c) #ffffff (d) #000000
27. 27.🌈 In #f30000 the red part is the hex number f3. What is it as a normal number?
28. 28.🌈 Which colour is #000000? (a) yellow (b) magenta (c) black (d) red
29. 29.🌈 Which hex code is blue? (a) #00ff00 (b) #000000 (c) #ffffff (d) #0000ff
30. 30.🌈 In #6c0000 the red part is the hex number 6c. What is it as a normal number?
31. 31.🌈 In #00c100 the green part is the hex number c1. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(191, 67, 2)? (a) red (b) blue (c) green
33. 33.🌈 In #00d900 the green part is the hex number d9. What is it as a normal number?
34. 34.🌈 Which colour is #0000ff? (a) magenta (b) blue (c) cyan (d) red
35. 35.🌈 Which colour is #ff00ff? (a) red (b) cyan (c) magenta (d) blue
36. 36.🌈 In #009500 the green part is the hex number 95. What is it as a normal number?
37. 37.🌈 In #000012 the blue part is the hex number 12. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(242, 81, 19)? (a) green (b) blue (c) red
39. 39.🌈 In #db0000 the red part is the hex number db. What is it as a normal number?
40. 40.🌈 In #00006c the blue part is the hex number 6c. What is it as a normal number?

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