CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 272 · 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 hex code is magenta? (a) #ff0000 (b) #00ffff (c) #0000ff (d) #ff00ff
2. 2.🌈 In #660000 the red part is the hex number 66. What is it as a normal number?
3. 3.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 100 (d) 255
4. 4.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) red (c) cyan (d) yellow
5. 5.🌈 In #001600 the green part is the hex number 16. What is it as a normal number?
6. 6.🌈 Which colour is #000000? (a) black (b) blue (c) red (d) magenta
7. 7.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) bright green (c) blue (d) black
8. 8.🌈 Which hex code is white? (a) #00ffff (b) #ff00ff (c) #000000 (d) #ffffff
9. 9.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 3 (d) 6
10. 10.🌈 In #008500 the green part is the hex number 85. What is it as a normal number?
11. 11.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) green (d) blue
12. 12.🌈 In #000067 the blue part is the hex number 67. What is it as a normal number?
13. 13.🌈 In #000064 the blue part is the hex number 64. What is it as a normal number?
14. 14.🌈 In #000066 the blue part is the hex number 66. What is it as a normal number?
15. 15.🌈 Which colour is #ff0000? (a) magenta (b) black (c) bright green (d) red
16. 16.🌈 Which colour is #0000ff? (a) bright green (b) magenta (c) black (d) blue
17. 17.🌈 In #000099 the blue part is the hex number 99. What is it as a normal number?
18. 18.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) white (c) cyan (d) blue
19. 19.🌈 Which colour of light is strongest in rgb(173, 102, 130)? (a) green (b) blue (c) red
20. 20.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) magenta (c) bright green (d) yellow
21. 21.🌈 In #000012 the blue part is the hex number 12. What is it as a normal number?
22. 22.🌈 Which colour is #ffff00? (a) cyan (b) magenta (c) yellow (d) bright green
23. 23.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) red (c) bright green (d) blue
24. 24.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) Z (c) J (d) G
25. 25.🌈 In #00004e the blue part is the hex number 4e. What is it as a normal number?
26. 26.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) white (c) red (d) green
27. 27.🌈 Which colour is #ffffff? (a) white (b) magenta (c) yellow (d) red
28. 28.🌈 Which hex code is blue? (a) #ff0000 (b) #ff00ff (c) #00ff00 (d) #0000ff
29. 29.🌈 In #000043 the blue part is the hex number 43. What is it as a normal number?
30. 30.🌈 Which colour of light is strongest in rgb(125, 133, 200)? (a) blue (b) green (c) red
31. 31.🌈 Which hex code is red? (a) #ff0000 (b) #0000ff (c) #00ff00 (d) #00ffff
32. 32.🌈 Which colour is #00ff00? (a) yellow (b) bright green (c) black (d) blue
33. 33.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) cyan (c) magenta (d) yellow
34. 34.🌈 In #00ea00 the green part is the hex number ea. What is it as a normal number?
35. 35.🌈 In #e70000 the red part is the hex number e7. What is it as a normal number?
36. 36.🌈 Which hex code is yellow? (a) #ff00ff (b) #0000ff (c) #ffff00 (d) #00ff00
37. 37.🌈 In #006900 the green part is the hex number 69. What is it as a normal number?
38. 38.🌈 In #00a000 the green part is the hex number a0. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(207, 91, 127)? (a) blue (b) green (c) red
40. 40.🌈 Which hex code is bright green? (a) #000000 (b) #0000ff (c) #00ff00 (d) #ff0000

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