CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 282 · 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.🌈 In #990000 the red part is the hex number 99. What is it as a normal number?
2. 2.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) F (d) J
3. 3.🌈 Which colour is #0000ff? (a) red (b) black (c) blue (d) bright green
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 6 (d) 4
5. 5.🌈 Which colour of light is strongest in rgb(18, 36, 165)? (a) green (b) red (c) blue
6. 6.🌈 Which hex code is bright green? (a) #00ff00 (b) #ff0000 (c) #ff00ff (d) #000000
7. 7.🌈 In #000047 the blue part is the hex number 47. What is it as a normal number?
8. 8.🌈 Which colour is rgb(255, 0, 0)? (a) magenta (b) blue (c) black (d) red
9. 9.🌈 Which colour is #00ffff? (a) cyan (b) yellow (c) magenta (d) blue
10. 10.🌈 Which colour of light is strongest in rgb(125, 228, 95)? (a) blue (b) green (c) red
11. 11.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) red (c) white (d) yellow
12. 12.🌈 Which colour of light is strongest in rgb(122, 189, 39)? (a) red (b) green (c) blue
13. 13.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 100 (c) 99 (d) 255
14. 14.🌈 In #00be00 the green part is the hex number be. What is it as a normal number?
15. 15.🌈 Which colour is #ffff00? (a) bright green (b) white (c) yellow (d) cyan
16. 16.🌈 Which colour of light is strongest in rgb(36, 80, 178)? (a) blue (b) green (c) red
17. 17.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) black (c) blue (d) green
18. 18.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) cyan (c) yellow (d) black
19. 19.🌈 Which colour is #000000? (a) magenta (b) blue (c) yellow (d) black
20. 20.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) green (d) white
21. 21.🌈 Which colour is #ff00ff? (a) black (b) white (c) magenta (d) cyan
22. 22.🌈 Which hex code is red? (a) #00ff00 (b) #ff0000 (c) #000000 (d) #ffffff
23. 23.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) magenta (c) white (d) cyan
24. 24.🌈 In #001e00 the green part is the hex number 1e. What is it as a normal number?
25. 25.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) red (c) bright green (d) cyan
26. 26.🌈 Which hex code is cyan? (a) #ffffff (b) #00ffff (c) #ff0000 (d) #0000ff
27. 27.🌈 Which hex code is blue? (a) #00ffff (b) #ffffff (c) #0000ff (d) #ffff00
28. 28.🌈 In #00c300 the green part is the hex number c3. What is it as a normal number?
29. 29.🌈 In #5c0000 the red part is the hex number 5c. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(128, 222, 77)? (a) green (b) red (c) blue
31. 31.🌈 In #310000 the red part is the hex number 31. What is it as a normal number?
32. 32.🌈 Which colour is #ff0000? (a) red (b) bright green (c) blue (d) yellow
33. 33.🌈 Which colour is #00ff00? (a) black (b) magenta (c) bright green (d) cyan
34. 34.🌈 Which colour of light is strongest in rgb(5, 210, 24)? (a) green (b) red (c) blue
35. 35.🌈 Which colour of light is strongest in rgb(246, 37, 116)? (a) blue (b) green (c) red
36. 36.🌈 In #0000c0 the blue part is the hex number c0. What is it as a normal number?
37. 37.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) black (c) white (d) yellow
38. 38.🌈 In #260000 the red part is the hex number 26. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(208, 80, 89)? (a) red (b) green (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(72, 153, 121)? (a) green (b) red (c) blue

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