CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 247 · 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 #ff00ff? (a) yellow (b) red (c) magenta (d) blue
2. 2.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
3. 3.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) black (c) green (d) blue
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 3 (c) 6 (d) 2
5. 5.🌈 Which colour of light is strongest in rgb(210, 129, 72)? (a) green (b) blue (c) red
6. 6.🌈 Which colour is rgb(255, 0, 255)? (a) bright green (b) red (c) magenta (d) yellow
7. 7.🌈 Which colour is rgb(0, 0, 0)? (a) bright green (b) yellow (c) black (d) red
8. 8.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) yellow (c) red (d) cyan
9. 9.🌈 Which hex code is black? (a) #ffffff (b) #000000 (c) #00ff00 (d) #ffff00
10. 10.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) white (d) green
11. 11.🌈 Which colour is #ffff00? (a) magenta (b) black (c) yellow (d) cyan
12. 12.🌈 Which colour of light is strongest in rgb(39, 172, 130)? (a) red (b) green (c) blue
13. 13.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) red (c) black (d) bright green
14. 14.🌈 Which hex code is blue? (a) #0000ff (b) #00ffff (c) #ffff00 (d) #ffffff
15. 15.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 255 (d) 100
16. 16.🌈 In #cd0000 the red part is the hex number cd. What is it as a normal number?
17. 17.🌈 In #4b0000 the red part is the hex number 4b. What is it as a normal number?
18. 18.🌈 Which hex code is bright green? (a) #0000ff (b) #ff0000 (c) #00ff00 (d) #000000
19. 19.🌈 Which colour is #ffffff? (a) bright green (b) magenta (c) black (d) white
20. 20.🌈 In #000004 the blue part is the hex number 04. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(136, 231, 21)? (a) blue (b) red (c) green
22. 22.🌈 Which colour is #ff0000? (a) magenta (b) red (c) cyan (d) white
23. 23.🌈 In #260000 the red part is the hex number 26. What is it as a normal number?
24. 24.🌈 Which colour of light is strongest in rgb(23, 252, 140)? (a) red (b) blue (c) green
25. 25.🌈 Which colour is #000000? (a) cyan (b) red (c) black (d) blue
26. 26.🌈 In #005d00 the green part is the hex number 5d. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(164, 75, 133)? (a) red (b) blue (c) green
28. 28.🌈 Which colour of light is strongest in rgb(124, 155, 134)? (a) blue (b) red (c) green
29. 29.🌈 In #760000 the red part is the hex number 76. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(5, 98, 162)? (a) red (b) green (c) blue
31. 31.🌈 In #8d0000 the red part is the hex number 8d. What is it as a normal number?
32. 32.🌈 In #300000 the red part is the hex number 30. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(238, 76, 106)? (a) red (b) blue (c) green
34. 34.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) white (c) blue (d) bright green
35. 35.🌈 Which hex code is red? (a) #ffffff (b) #000000 (c) #00ff00 (d) #ff0000
36. 36.🌈 In #001000 the green part is the hex number 10. What is it as a normal number?
37. 37.🌈 Which colour of light is strongest in rgb(222, 129, 75)? (a) red (b) green (c) blue
38. 38.🌈 In #003700 the green part is the hex number 37. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(9, 176, 104)? (a) red (b) blue (c) green
40. 40.🌈 Which colour of light is strongest in rgb(18, 41, 204)? (a) blue (b) red (c) green

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