CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 88 · 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) black (b) white (c) blue (d) magenta
2. 2.🌈 Which hex code is red? (a) #00ffff (b) #ff00ff (c) #ffff00 (d) #ff0000
3. 3.🌈 Which colour of light is strongest in rgb(30, 230, 131)? (a) red (b) blue (c) green
4. 4.🌈 Which hex code is bright green? (a) #0000ff (b) #ffffff (c) #ff0000 (d) #00ff00
5. 5.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) cyan (c) magenta (d) blue
6. 6.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) red (d) black
7. 7.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 4 (c) 6 (d) 2
8. 8.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 100 (d) 1000
9. 9.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) red (d) white
10. 10.🌈 Which colour is rgb(255, 255, 0)? (a) white (b) yellow (c) cyan (d) bright green
11. 11.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) yellow (c) white (d) red
12. 12.🌈 Which hex code is yellow? (a) #ff00ff (b) #000000 (c) #ffffff (d) #ffff00
13. 13.🌈 Which colour of light is strongest in rgb(162, 32, 97)? (a) red (b) green (c) blue
14. 14.🌈 Which colour of light is strongest in rgb(46, 151, 1)? (a) green (b) blue (c) red
15. 15.🌈 Which colour of light is strongest in rgb(126, 40, 208)? (a) red (b) green (c) blue
16. 16.🌈 Which colour is #0000ff? (a) bright green (b) blue (c) yellow (d) red
17. 17.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) black (c) red (d) white
18. 18.🌈 In #0000d1 the blue part is the hex number d1. What is it as a normal number?
19. 19.🌈 Which colour of light is strongest in rgb(5, 88, 226)? (a) blue (b) green (c) red
20. 20.🌈 Which hex code is black? (a) #000000 (b) #ffff00 (c) #ff0000 (d) #00ff00
21. 21.🌈 Which colour of light is strongest in rgb(179, 113, 129)? (a) green (b) red (c) blue
22. 22.🌈 In #0000e1 the blue part is the hex number e1. What is it as a normal number?
23. 23.🌈 Which colour is #000000? (a) blue (b) white (c) black (d) yellow
24. 24.🌈 Which colour is #ff0000? (a) bright green (b) red (c) black (d) cyan
25. 25.🌈 Which colour is #00ff00? (a) red (b) black (c) blue (d) bright green
26. 26.🌈 In #00000b the blue part is the hex number 0b. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(23, 237, 18)? (a) blue (b) red (c) green
28. 28.🌈 Which colour of light is strongest in rgb(250, 4, 80)? (a) blue (b) green (c) red
29. 29.🌈 Which colour is #00ffff? (a) bright green (b) cyan (c) black (d) blue
30. 30.🌈 Which colour of light is strongest in rgb(0, 176, 16)? (a) blue (b) green (c) red
31. 31.🌈 Which hex code is cyan? (a) #00ff00 (b) #ff0000 (c) #ffff00 (d) #00ffff
32. 32.🌈 Which colour of light is strongest in rgb(21, 170, 9)? (a) blue (b) green (c) red
33. 33.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) Z (d) J
34. 34.🌈 In #0000c7 the blue part is the hex number c7. What is it as a normal number?
35. 35.🌈 In #c20000 the red part is the hex number c2. What is it as a normal number?
36. 36.🌈 In #0000b5 the blue part is the hex number b5. What is it as a normal number?
37. 37.🌈 In #000000 the red part is the hex number 00. What is it as a normal number?
38. 38.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) blue (c) cyan (d) bright green
39. 39.🌈 Which colour is #ffffff? (a) bright green (b) red (c) magenta (d) white
40. 40.🌈 In #cd0000 the red part is the hex number cd. What is it as a normal number?

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