CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 103 · 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 #0000b7 the blue part is the hex number b7. What is it as a normal number?
2. 2.🌈 Which colour is rgb(0, 0, 0)? (a) magenta (b) bright green (c) black (d) yellow
3. 3.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ffff (c) #00ff00 (d) #0000ff
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 2 (c) 3 (d) 4
5. 5.🌈 Which colour is #ffffff? (a) bright green (b) cyan (c) black (d) white
6. 6.🌈 In #008000 the green part is the hex number 80. What is it as a normal number?
7. 7.🌈 In #1e0000 the red part is the hex number 1e. What is it as a normal number?
8. 8.🌈 Which colour of light is strongest in rgb(193, 21, 83)? (a) blue (b) red (c) green
9. 9.🌈 In #000051 the blue part is the hex number 51. What is it as a normal number?
10. 10.🌈 Which hex code is red? (a) #00ff00 (b) #000000 (c) #0000ff (d) #ff0000
11. 11.🌈 Which hex code is white? (a) #ffffff (b) #00ffff (c) #ff0000 (d) #00ff00
12. 12.🌈 Which colour of light is strongest in rgb(86, 202, 21)? (a) green (b) blue (c) red
13. 13.🌈 In #7b0000 the red part is the hex number 7b. What is it as a normal number?
14. 14.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) cyan (c) yellow (d) blue
15. 15.🌈 Which colour of light is strongest in rgb(180, 42, 41)? (a) green (b) red (c) blue
16. 16.🌈 In #00009f the blue part is the hex number 9f. What is it as a normal number?
17. 17.🌈 Which hex code is cyan? (a) #00ff00 (b) #0000ff (c) #00ffff (d) #ff00ff
18. 18.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
19. 19.🌈 Which hex code is blue? (a) #000000 (b) #0000ff (c) #00ff00 (d) #00ffff
20. 20.🌈 Which colour is #ff00ff? (a) magenta (b) bright green (c) cyan (d) blue
21. 21.🌈 Which colour of light is strongest in rgb(18, 44, 230)? (a) red (b) blue (c) green
22. 22.🌈 In #005e00 the green part is the hex number 5e. What is it as a normal number?
23. 23.🌈 Which hex code is yellow? (a) #ff0000 (b) #00ff00 (c) #ffff00 (d) #00ffff
24. 24.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) bright green (c) yellow (d) magenta
25. 25.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 99 (d) 255
26. 26.🌈 Which colour of light is strongest in rgb(241, 54, 85)? (a) blue (b) red (c) green
27. 27.🌈 Which colour of light is strongest in rgb(214, 18, 46)? (a) red (b) green (c) blue
28. 28.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
29. 29.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) yellow (c) red (d) bright green
30. 30.🌈 Which colour is #ff0000? (a) red (b) bright green (c) magenta (d) yellow
31. 31.🌈 In #008800 the green part is the hex number 88. What is it as a normal number?
32. 32.🌈 Which colour is #000000? (a) blue (b) magenta (c) black (d) yellow
33. 33.🌈 In #2e0000 the red part is the hex number 2e. What is it as a normal number?
34. 34.🌈 In #0000df the blue part is the hex number df. What is it as a normal number?
35. 35.🌈 Which colour is #ffff00? (a) yellow (b) blue (c) bright green (d) cyan
36. 36.🌈 Which colour of light is strongest in rgb(166, 124, 36)? (a) red (b) blue (c) green
37. 37.🌈 Which hex code is magenta? (a) #ffff00 (b) #ff0000 (c) #ff00ff (d) #0000ff
38. 38.🌈 Which colour of light is strongest in rgb(244, 136, 64)? (a) blue (b) green (c) red
39. 39.🌈 In #000062 the blue part is the hex number 62. What is it as a normal number?
40. 40.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) red (c) blue (d) cyan

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