CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 63 · 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.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 6 (d) 3
2. 2.🌈 Which colour of light is strongest in rgb(53, 9, 192)? (a) green (b) blue (c) red
3. 3.🌈 Which colour of light is strongest in rgb(154, 47, 55)? (a) red (b) blue (c) green
4. 4.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) magenta (c) yellow (d) black
5. 5.🌈 Which colour of light is strongest in rgb(35, 219, 105)? (a) red (b) green (c) blue
6. 6.🌈 Which colour is #ff00ff? (a) bright green (b) blue (c) red (d) magenta
7. 7.🌈 Which hex code is bright green? (a) #ffffff (b) #0000ff (c) #ffff00 (d) #00ff00
8. 8.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) black (c) yellow (d) white
9. 9.🌈 In #6a0000 the red part is the hex number 6a. What is it as a normal number?
10. 10.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) white (c) yellow (d) blue
11. 11.🌈 Which colour of light is strongest in rgb(27, 58, 185)? (a) green (b) blue (c) red
12. 12.🌈 Which colour is #000000? (a) black (b) white (c) magenta (d) red
13. 13.🌈 In #00e500 the green part is the hex number e5. What is it as a normal number?
14. 14.🌈 Which colour is #ffff00? (a) bright green (b) cyan (c) red (d) yellow
15. 15.🌈 Which colour is rgb(0, 255, 255)? (a) white (b) magenta (c) cyan (d) yellow
16. 16.🌈 In #a10000 the red part is the hex number a1. What is it as a normal number?
17. 17.🌈 In #0000ba the blue part is the hex number ba. What is it as a normal number?
18. 18.🌈 Which colour of light is strongest in rgb(150, 133, 124)? (a) blue (b) red (c) green
19. 19.🌈 Which hex code is blue? (a) #000000 (b) #0000ff (c) #ff00ff (d) #ffff00
20. 20.🌈 Which colour is #ffffff? (a) white (b) black (c) blue (d) cyan
21. 21.🌈 Which hex code is red? (a) #00ffff (b) #ff0000 (c) #ffff00 (d) #ffffff
22. 22.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) bright green (c) yellow (d) blue
23. 23.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 255 (d) 1000
24. 24.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) blue (d) black
25. 25.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) white (c) red (d) green
26. 26.🌈 Which colour is #ff0000? (a) blue (b) white (c) red (d) magenta
27. 27.🌈 In #fa0000 the red part is the hex number fa. What is it as a normal number?
28. 28.🌈 In #000066 the blue part is the hex number 66. What is it as a normal number?
29. 29.🌈 Which colour is #00ff00? (a) bright green (b) yellow (c) cyan (d) blue
30. 30.🌈 Which hex code is black? (a) #000000 (b) #00ffff (c) #ffffff (d) #00ff00
31. 31.🌈 Which colour of light is strongest in rgb(113, 19, 170)? (a) green (b) red (c) blue
32. 32.🌈 Which hex code is yellow? (a) #00ff00 (b) #00ffff (c) #ffffff (d) #ffff00
33. 33.🌈 Which colour of light is strongest in rgb(96, 28, 223)? (a) green (b) blue (c) red
34. 34.🌈 Which colour of light is strongest in rgb(93, 166, 37)? (a) blue (b) red (c) green
35. 35.🌈 In #ee0000 the red part is the hex number ee. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(163, 28, 21)? (a) green (b) red (c) blue
37. 37.🌈 Which colour of light is strongest in rgb(169, 91, 38)? (a) blue (b) red (c) green
38. 38.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) G (c) F (d) J
39. 39.🌈 In #820000 the red part is the hex number 82. What is it as a normal number?
40. 40.🌈 In #7e0000 the red part is the hex number 7e. What is it as a normal number?

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