CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 299 · 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) red (b) magenta (c) cyan (d) white
2. 2.🌈 In #006d00 the green part is the hex number 6d. What is it as a normal number?
3. 3.🌈 Which hex code is black? (a) #00ffff (b) #ff0000 (c) #ffffff (d) #000000
4. 4.🌈 Which colour of light is strongest in rgb(22, 249, 19)? (a) red (b) blue (c) green
5. 5.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
6. 6.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) F (c) J (d) G
7. 7.🌈 Which colour of light is strongest in rgb(182, 11, 86)? (a) green (b) red (c) blue
8. 8.🌈 Which colour is #000000? (a) black (b) red (c) magenta (d) white
9. 9.🌈 Which colour of light is strongest in rgb(49, 39, 238)? (a) green (b) blue (c) red
10. 10.🌈 Which colour of light is strongest in rgb(239, 105, 2)? (a) green (b) red (c) blue
11. 11.🌈 Which colour is #ff00ff? (a) red (b) white (c) magenta (d) bright green
12. 12.🌈 Which colour of light is strongest in rgb(32, 151, 54)? (a) green (b) blue (c) red
13. 13.🌈 Which colour is rgb(255, 0, 255)? (a) red (b) magenta (c) yellow (d) blue
14. 14.🌈 Which colour of light is strongest in rgb(102, 195, 101)? (a) green (b) red (c) blue
15. 15.🌈 Which colour of light is strongest in rgb(231, 64, 65)? (a) green (b) blue (c) red
16. 16.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) black (c) cyan (d) red
17. 17.🌈 Which colour of light is strongest in rgb(217, 59, 2)? (a) green (b) blue (c) red
18. 18.🌈 Which colour of light is strongest in rgb(224, 118, 135)? (a) blue (b) red (c) green
19. 19.🌈 Which hex code is cyan? (a) #0000ff (b) #ffffff (c) #00ff00 (d) #00ffff
20. 20.🌈 Which hex code is yellow? (a) #00ff00 (b) #ff00ff (c) #ffffff (d) #ffff00
21. 21.🌈 Which colour of light is strongest in rgb(137, 111, 211)? (a) green (b) red (c) blue
22. 22.🌈 In #c60000 the red part is the hex number c6. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(179, 112, 69)? (a) green (b) blue (c) red
24. 24.🌈 In #5f0000 the red part is the hex number 5f. What is it as a normal number?
25. 25.🌈 In #000019 the blue part is the hex number 19. What is it as a normal number?
26. 26.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) magenta (c) blue (d) white
27. 27.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) green (d) white
28. 28.🌈 Which colour of light is strongest in rgb(232, 107, 105)? (a) green (b) blue (c) red
29. 29.🌈 Which colour of light is strongest in rgb(120, 188, 33)? (a) red (b) green (c) blue
30. 30.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) magenta (c) white (d) cyan
31. 31.🌈 Which colour is #00ffff? (a) black (b) yellow (c) cyan (d) blue
32. 32.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) yellow (c) bright green (d) magenta
33. 33.🌈 Which colour of light is strongest in rgb(82, 13, 210)? (a) blue (b) green (c) red
34. 34.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 6 (d) 3
35. 35.🌈 Which colour is #ffff00? (a) red (b) yellow (c) magenta (d) blue
36. 36.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 100 (d) 99
37. 37.🌈 Which colour of light is strongest in rgb(184, 132, 116)? (a) green (b) blue (c) red
38. 38.🌈 In #de0000 the red part is the hex number de. What is it as a normal number?
39. 39.🌈 Which hex code is white? (a) #00ff00 (b) #0000ff (c) #ffffff (d) #ff0000
40. 40.🌈 In #db0000 the red part is the hex number db. What is it as a normal number?

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