CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 185 · 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 rgb(0, 0, 255)? (a) cyan (b) bright green (c) blue (d) magenta
2. 2.🌈 In #f20000 the red part is the hex number f2. What is it as a normal number?
3. 3.🌈 Which colour is rgb(0, 255, 255)? (a) bright green (b) blue (c) cyan (d) yellow
4. 4.🌈 Which colour of light is strongest in rgb(100, 22, 192)? (a) green (b) blue (c) red
5. 5.🌈 In #004200 the green part is the hex number 42. What is it as a normal number?
6. 6.🌈 Which colour of light is strongest in rgb(139, 110, 239)? (a) green (b) red (c) blue
7. 7.🌈 Which colour of light is strongest in rgb(217, 140, 46)? (a) green (b) red (c) blue
8. 8.🌈 Which colour of light is strongest in rgb(212, 134, 34)? (a) blue (b) green (c) red
9. 9.🌈 Which colour is #ff0000? (a) magenta (b) blue (c) cyan (d) red
10. 10.🌈 Which hex code is black? (a) #00ff00 (b) #ff0000 (c) #0000ff (d) #000000
11. 11.🌈 Which colour of light is strongest in rgb(4, 158, 117)? (a) blue (b) green (c) red
12. 12.🌈 In #000088 the blue part is the hex number 88. What is it as a normal number?
13. 13.🌈 In #000033 the blue part is the hex number 33. What is it as a normal number?
14. 14.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 4 (c) 6 (d) 2
15. 15.🌈 In #000012 the blue part is the hex number 12. What is it as a normal number?
16. 16.🌈 Which hex code is blue? (a) #ffffff (b) #000000 (c) #0000ff (d) #00ffff
17. 17.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) yellow (c) magenta (d) cyan
18. 18.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) red (c) magenta (d) bright green
19. 19.🌈 Which colour of light is strongest in rgb(162, 84, 56)? (a) green (b) red (c) blue
20. 20.🌈 In #000060 the blue part is the hex number 60. What is it as a normal number?
21. 21.🌈 Which colour of light is strongest in rgb(209, 70, 52)? (a) blue (b) red (c) green
22. 22.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) green (d) black
23. 23.🌈 Which colour is #ff00ff? (a) cyan (b) magenta (c) red (d) blue
24. 24.🌈 Which hex code is cyan? (a) #ff0000 (b) #000000 (c) #ff00ff (d) #00ffff
25. 25.🌈 Which colour is #ffff00? (a) red (b) blue (c) yellow (d) cyan
26. 26.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) F (c) G (d) Z
27. 27.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) yellow (c) magenta (d) bright green
28. 28.🌈 Which colour is #00ffff? (a) blue (b) magenta (c) bright green (d) cyan
29. 29.🌈 In #4b0000 the red part is the hex number 4b. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(166, 54, 75)? (a) blue (b) red (c) green
31. 31.🌈 Which colour of light is strongest in rgb(169, 33, 26)? (a) blue (b) red (c) green
32. 32.🌈 In #710000 the red part is the hex number 71. What is it as a normal number?
33. 33.🌈 Which hex code is white? (a) #ffffff (b) #ff0000 (c) #00ff00 (d) #0000ff
34. 34.🌈 In #0000d6 the blue part is the hex number d6. What is it as a normal number?
35. 35.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) red (c) blue (d) white
36. 36.🌈 In #210000 the red part is the hex number 21. What is it as a normal number?
37. 37.🌈 Which hex code is yellow? (a) #000000 (b) #ff00ff (c) #00ffff (d) #ffff00
38. 38.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 1000 (d) 255
39. 39.🌈 Which colour of light is strongest in rgb(12, 47, 162)? (a) red (b) green (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(253, 77, 31)? (a) red (b) green (c) blue

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