CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 310 · 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 #00a200 the green part is the hex number a2. What is it as a normal number?
2. 2.🌈 In #002d00 the green part is the hex number 2d. What is it as a normal number?
3. 3.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
4. 4.🌈 In #000600 the green part is the hex number 06. What is it as a normal number?
5. 5.🌈 Which colour is rgb(0, 255, 0)? (a) yellow (b) black (c) bright green (d) cyan
6. 6.🌈 Which hex code is black? (a) #ffffff (b) #ff0000 (c) #000000 (d) #ff00ff
7. 7.🌈 Which colour is #ffff00? (a) blue (b) yellow (c) white (d) red
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) black (d) red
9. 9.🌈 Which colour of light is strongest in rgb(245, 7, 69)? (a) blue (b) red (c) green
10. 10.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) F (c) G (d) J
11. 11.🌈 Which hex code is magenta? (a) #0000ff (b) #ffff00 (c) #00ffff (d) #ff00ff
12. 12.🌈 Which colour is #ff00ff? (a) blue (b) red (c) bright green (d) magenta
13. 13.🌈 Which colour is rgb(0, 0, 255)? (a) yellow (b) bright green (c) red (d) blue
14. 14.🌈 Which colour is #00ff00? (a) magenta (b) red (c) bright green (d) cyan
15. 15.🌈 Which colour of light is strongest in rgb(169, 75, 63)? (a) green (b) blue (c) red
16. 16.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) yellow (c) bright green (d) red
17. 17.🌈 Which hex code is bright green? (a) #00ff00 (b) #0000ff (c) #00ffff (d) #ff0000
18. 18.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) blue (c) yellow (d) bright green
19. 19.🌈 In #000000 the green part is the hex number 00. What is it as a normal number?
20. 20.🌈 In #005d00 the green part is the hex number 5d. What is it as a normal number?
21. 21.🌈 Which colour is #ffffff? (a) white (b) magenta (c) black (d) cyan
22. 22.🌈 Which hex code is cyan? (a) #0000ff (b) #ff00ff (c) #00ff00 (d) #00ffff
23. 23.🌈 Which colour is #ff0000? (a) red (b) cyan (c) magenta (d) bright green
24. 24.🌈 In #a10000 the red part is the hex number a1. What is it as a normal number?
25. 25.🌈 In #0000a9 the blue part is the hex number a9. What is it as a normal number?
26. 26.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 3 (d) 2
27. 27.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) bright green (c) black (d) magenta
28. 28.🌈 In #870000 the red part is the hex number 87. What is it as a normal number?
29. 29.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 255 (c) 1000 (d) 100
30. 30.🌈 Which colour is #0000ff? (a) white (b) cyan (c) black (d) blue
31. 31.🌈 In #00009a the blue part is the hex number 9a. What is it as a normal number?
32. 32.🌈 In #0000c1 the blue part is the hex number c1. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(226, 64, 85)? (a) green (b) red (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(125, 4, 176)? (a) blue (b) green (c) red
35. 35.🌈 In #009300 the green part is the hex number 93. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(108, 132, 222)? (a) green (b) red (c) blue
37. 37.🌈 In #1a0000 the red part is the hex number 1a. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(10, 246, 63)? (a) red (b) green (c) blue
39. 39.🌈 In #00003c the blue part is the hex number 3c. What is it as a normal number?
40. 40.🌈 In #00d300 the green part is the hex number d3. What is it as a normal number?

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