CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 142 · 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 #0000a9 the blue part is the hex number a9. What is it as a normal number?
2. 2.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) magenta (c) yellow (d) red
3. 3.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 3 (d) 2
4. 4.🌈 In #003c00 the green part is the hex number 3c. What is it as a normal number?
5. 5.🌈 Which hex code is bright green? (a) #ffff00 (b) #ffffff (c) #ff00ff (d) #00ff00
6. 6.🌈 Which colour of light is strongest in rgb(150, 66, 34)? (a) green (b) blue (c) red
7. 7.🌈 Which colour is rgb(0, 0, 255)? (a) bright green (b) cyan (c) blue (d) black
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) blue (d) white
9. 9.🌈 Which hex code is white? (a) #00ffff (b) #ffffff (c) #00ff00 (d) #ffff00
10. 10.🌈 Which hex code is red? (a) #ffffff (b) #00ff00 (c) #ff0000 (d) #ff00ff
11. 11.🌈 Which colour of light is strongest in rgb(13, 130, 234)? (a) green (b) red (c) blue
12. 12.🌈 In #630000 the red part is the hex number 63. What is it as a normal number?
13. 13.🌈 Which colour of light is strongest in rgb(51, 82, 175)? (a) red (b) blue (c) green
14. 14.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) blue (c) red (d) green
15. 15.🌈 Which colour is #000000? (a) black (b) magenta (c) blue (d) cyan
16. 16.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) white (c) magenta (d) bright green
17. 17.🌈 Which colour of light is strongest in rgb(205, 6, 11)? (a) green (b) red (c) blue
18. 18.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) red (c) white (d) black
19. 19.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) black (c) cyan (d) yellow
20. 20.🌈 In #005500 the green part is the hex number 55. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(34, 171, 16)? (a) blue (b) red (c) green
22. 22.🌈 Which colour is #0000ff? (a) red (b) magenta (c) blue (d) black
23. 23.🌈 Which colour is #00ffff? (a) cyan (b) white (c) black (d) red
24. 24.🌈 Which hex code is cyan? (a) #ffffff (b) #ffff00 (c) #00ffff (d) #0000ff
25. 25.🌈 In #f10000 the red part is the hex number f1. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(58, 161, 64)? (a) red (b) blue (c) green
27. 27.🌈 In #000043 the blue part is the hex number 43. What is it as a normal number?
28. 28.🌈 Which colour of light is strongest in rgb(58, 90, 236)? (a) red (b) green (c) blue
29. 29.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) Z (d) G
30. 30.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 1000 (d) 100
31. 31.🌈 Which colour is #00ff00? (a) white (b) red (c) yellow (d) bright green
32. 32.🌈 Which colour is #ffffff? (a) cyan (b) black (c) white (d) yellow
33. 33.🌈 Which colour is #ff00ff? (a) red (b) cyan (c) black (d) magenta
34. 34.🌈 In #00da00 the green part is the hex number da. What is it as a normal number?
35. 35.🌈 Which colour is rgb(0, 255, 255)? (a) magenta (b) red (c) bright green (d) cyan
36. 36.🌈 Which colour of light is strongest in rgb(93, 222, 100)? (a) blue (b) red (c) green
37. 37.🌈 Which colour of light is strongest in rgb(164, 20, 25)? (a) blue (b) red (c) green
38. 38.🌈 In #8c0000 the red part is the hex number 8c. What is it as a normal number?
39. 39.🌈 In #002c00 the green part is the hex number 2c. What is it as a normal number?
40. 40.🌈 In #000000 the blue part is the hex number 00. What is it as a normal number?

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