CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 122 · 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) magenta (b) bright green (c) cyan (d) white
2. 2.🌈 Which colour of light is strongest in rgb(248, 127, 51)? (a) blue (b) red (c) green
3. 3.🌈 In #001f00 the green part is the hex number 1f. What is it as a normal number?
4. 4.🌈 Which colour is rgb(255, 255, 255)? (a) white (b) black (c) red (d) blue
5. 5.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
6. 6.🌈 In #340000 the red part is the hex number 34. What is it as a normal number?
7. 7.🌈 Which colour is #00ff00? (a) bright green (b) cyan (c) red (d) black
8. 8.🌈 Which hex code is bright green? (a) #00ff00 (b) #ff0000 (c) #ffffff (d) #000000
9. 9.🌈 In #00000d the blue part is the hex number 0d. What is it as a normal number?
10. 10.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 2 (c) 4 (d) 3
11. 11.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) blue (d) red
12. 12.🌈 Which colour is rgb(255, 0, 255)? (a) white (b) red (c) magenta (d) black
13. 13.🌈 In #eb0000 the red part is the hex number eb. What is it as a normal number?
14. 14.🌈 Which hex code is red? (a) #00ff00 (b) #0000ff (c) #ff0000 (d) #000000
15. 15.🌈 In #0000d6 the blue part is the hex number d6. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(172, 1, 21)? (a) red (b) blue (c) green
17. 17.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) bright green (c) yellow (d) blue
18. 18.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 99 (d) 1000
19. 19.🌈 Which colour is #ffff00? (a) cyan (b) black (c) yellow (d) blue
20. 20.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) white (c) magenta (d) red
21. 21.🌈 Which colour is #ff0000? (a) black (b) white (c) blue (d) red
22. 22.🌈 Which hex code is white? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ffff00
23. 23.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) J (c) G (d) F
24. 24.🌈 Which hex code is magenta? (a) #000000 (b) #00ffff (c) #ff0000 (d) #ff00ff
25. 25.🌈 In #00e400 the green part is the hex number e4. What is it as a normal number?
26. 26.🌈 Which colour is rgb(255, 255, 0)? (a) blue (b) yellow (c) bright green (d) black
27. 27.🌈 Which hex code is yellow? (a) #00ffff (b) #ff0000 (c) #000000 (d) #ffff00
28. 28.🌈 Which colour is #0000ff? (a) yellow (b) red (c) cyan (d) blue
29. 29.🌈 In #000044 the blue part is the hex number 44. What is it as a normal number?
30. 30.🌈 In #008100 the green part is the hex number 81. What is it as a normal number?
31. 31.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) black (c) magenta (d) cyan
32. 32.🌈 Which colour of light is strongest in rgb(6, 235, 42)? (a) blue (b) red (c) green
33. 33.🌈 Which colour of light is strongest in rgb(135, 184, 89)? (a) red (b) green (c) blue
34. 34.🌈 Which colour of light is strongest in rgb(204, 129, 111)? (a) blue (b) red (c) green
35. 35.🌈 In #007400 the green part is the hex number 74. What is it as a normal number?
36. 36.🌈 Which colour of light is strongest in rgb(150, 89, 52)? (a) red (b) green (c) blue
37. 37.🌈 Which colour is #000000? (a) red (b) bright green (c) black (d) white
38. 38.🌈 In #00009e the blue part is the hex number 9e. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(22, 47, 213)? (a) red (b) blue (c) green
40. 40.🌈 Which colour of light is strongest in rgb(23, 218, 62)? (a) red (b) blue (c) green

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