CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 263 · 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 #00ffff? (a) red (b) yellow (c) cyan (d) magenta
2. 2.🌈 Which colour is #ff0000? (a) red (b) yellow (c) bright green (d) black
3. 3.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 100 (d) 255
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 2 (d) 4
5. 5.🌈 Which colour is #0000ff? (a) blue (b) cyan (c) red (d) black
6. 6.🌈 Which hex code is bright green? (a) #00ffff (b) #ffff00 (c) #0000ff (d) #00ff00
7. 7.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) black (d) red
8. 8.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) cyan (c) blue (d) white
9. 9.🌈 In #008700 the green part is the hex number 87. What is it as a normal number?
10. 10.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) black (c) white (d) bright green
11. 11.🌈 Which colour of light is strongest in rgb(43, 217, 92)? (a) green (b) blue (c) red
12. 12.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) red (c) white (d) blue
13. 13.🌈 In #000034 the blue part is the hex number 34. What is it as a normal number?
14. 14.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) G (c) Z (d) J
15. 15.🌈 Which colour of light is strongest in rgb(19, 207, 100)? (a) green (b) blue (c) red
16. 16.🌈 Which hex code is black? (a) #ff0000 (b) #ffff00 (c) #000000 (d) #00ff00
17. 17.🌈 Which colour of light is strongest in rgb(222, 106, 52)? (a) red (b) green (c) blue
18. 18.🌈 Which colour of light is strongest in rgb(103, 179, 66)? (a) blue (b) green (c) red
19. 19.🌈 In #e00000 the red part is the hex number e0. What is it as a normal number?
20. 20.🌈 Which hex code is blue? (a) #00ffff (b) #ffff00 (c) #0000ff (d) #00ff00
21. 21.🌈 In #003600 the green part is the hex number 36. What is it as a normal number?
22. 22.🌈 Which colour of light is strongest in rgb(77, 91, 162)? (a) red (b) green (c) blue
23. 23.🌈 Which colour of light is strongest in rgb(100, 180, 40)? (a) red (b) green (c) blue
24. 24.🌈 Which hex code is red? (a) #ffff00 (b) #00ffff (c) #00ff00 (d) #ff0000
25. 25.🌈 In #8f0000 the red part is the hex number 8f. What is it as a normal number?
26. 26.🌈 In #000044 the blue part is the hex number 44. What is it as a normal number?
27. 27.🌈 In #790000 the red part is the hex number 79. What is it as a normal number?
28. 28.🌈 Which colour of light is strongest in rgb(224, 73, 123)? (a) green (b) blue (c) red
29. 29.🌈 In #520000 the red part is the hex number 52. What is it as a normal number?
30. 30.🌈 In #fe0000 the red part is the hex number fe. What is it as a normal number?
31. 31.🌈 Which colour of light is strongest in rgb(215, 78, 21)? (a) green (b) red (c) blue
32. 32.🌈 Which colour is rgb(0, 255, 255)? (a) magenta (b) blue (c) yellow (d) cyan
33. 33.🌈 Which colour of light is strongest in rgb(122, 46, 218)? (a) blue (b) green (c) red
34. 34.🌈 Which colour is #ff00ff? (a) magenta (b) white (c) blue (d) bright green
35. 35.🌈 In #000020 the blue part is the hex number 20. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(215, 50, 2)? (a) green (b) blue (c) red
37. 37.🌈 Which colour is #ffffff? (a) red (b) white (c) yellow (d) cyan
38. 38.🌈 Which colour of light is strongest in rgb(176, 109, 61)? (a) blue (b) red (c) green
39. 39.🌈 In #000078 the blue part is the hex number 78. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(104, 67, 180)? (a) blue (b) green (c) red

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