CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 196 · 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(101, 157, 42)? (a) blue (b) red (c) green
2. 2.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) blue (d) red
3. 3.🌈 Which colour of light is strongest in rgb(213, 93, 1)? (a) blue (b) green (c) red
4. 4.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) yellow (c) black (d) magenta
5. 5.🌈 Which colour of light is strongest in rgb(78, 190, 108)? (a) green (b) blue (c) red
6. 6.🌈 Which hex code is cyan? (a) #ffffff (b) #000000 (c) #00ffff (d) #0000ff
7. 7.🌈 Which hex code is red? (a) #00ffff (b) #0000ff (c) #ff0000 (d) #00ff00
8. 8.🌈 Which hex code is white? (a) #ffff00 (b) #000000 (c) #ffffff (d) #ff0000
9. 9.🌈 Which colour of light is strongest in rgb(54, 229, 131)? (a) green (b) blue (c) red
10. 10.🌈 Which hex code is yellow? (a) #00ff00 (b) #ffffff (c) #ffff00 (d) #000000
11. 11.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
12. 12.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) bright green (c) white (d) yellow
13. 13.🌈 In #dc0000 the red part is the hex number dc. What is it as a normal number?
14. 14.🌈 In #000037 the blue part is the hex number 37. What is it as a normal number?
15. 15.🌈 In #000034 the blue part is the hex number 34. What is it as a normal number?
16. 16.🌈 In #000009 the blue part is the hex number 09. What is it as a normal number?
17. 17.🌈 Which colour is #00ff00? (a) bright green (b) yellow (c) blue (d) red
18. 18.🌈 Which colour is #ffff00? (a) black (b) yellow (c) bright green (d) red
19. 19.🌈 In #008a00 the green part is the hex number 8a. What is it as a normal number?
20. 20.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) black (c) red (d) magenta
21. 21.🌈 Which colour is #ff00ff? (a) white (b) blue (c) cyan (d) magenta
22. 22.🌈 In #002200 the green part is the hex number 22. What is it as a normal number?
23. 23.🌈 Which hex code is blue? (a) #000000 (b) #00ff00 (c) #0000ff (d) #ffff00
24. 24.🌈 Which colour of light is strongest in rgb(110, 37, 254)? (a) red (b) blue (c) green
25. 25.🌈 Which colour of light is strongest in rgb(200, 75, 136)? (a) green (b) blue (c) red
26. 26.🌈 Which colour of light is strongest in rgb(210, 25, 26)? (a) blue (b) green (c) red
27. 27.🌈 Which colour is #00ffff? (a) red (b) white (c) cyan (d) blue
28. 28.🌈 In #f40000 the red part is the hex number f4. What is it as a normal number?
29. 29.🌈 Which colour is rgb(0, 0, 0)? (a) blue (b) white (c) red (d) black
30. 30.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #ffffff (d) #0000ff
31. 31.🌈 Which colour is #0000ff? (a) yellow (b) blue (c) white (d) red
32. 32.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) red (d) green
33. 33.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 3 (d) 6
34. 34.🌈 Which colour of light is strongest in rgb(48, 254, 58)? (a) red (b) green (c) blue
35. 35.🌈 In #0000be the blue part is the hex number be. What is it as a normal number?
36. 36.🌈 In #006300 the green part is the hex number 63. What is it as a normal number?
37. 37.🌈 Which colour is #ff0000? (a) blue (b) black (c) magenta (d) red
38. 38.🌈 Which colour of light is strongest in rgb(0, 46, 240)? (a) green (b) red (c) blue
39. 39.🌈 Which colour of light is strongest in rgb(193, 108, 139)? (a) green (b) blue (c) red
40. 40.🌈 Which colour is #ffffff? (a) white (b) red (c) cyan (d) magenta

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