CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 257 · 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 of light is strongest in rgb(127, 92, 168)? (a) blue (b) red (c) green
2. 2.🌈 Which colour is #000000? (a) yellow (b) cyan (c) white (d) black
3. 3.🌈 Which colour is #00ff00? (a) yellow (b) white (c) black (d) bright green
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 4 (d) 6
5. 5.🌈 Which colour is #ffff00? (a) black (b) cyan (c) magenta (d) yellow
6. 6.🌈 In #900000 the red part is the hex number 90. What is it as a normal number?
7. 7.🌈 Which colour is #ff00ff? (a) red (b) magenta (c) bright green (d) black
8. 8.🌈 Which hex code is red? (a) #ff00ff (b) #ff0000 (c) #0000ff (d) #000000
9. 9.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) green (d) blue
10. 10.🌈 Which colour of light is strongest in rgb(193, 34, 104)? (a) blue (b) green (c) red
11. 11.🌈 Which hex code is bright green? (a) #ffffff (b) #ff0000 (c) #ffff00 (d) #00ff00
12. 12.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 99 (d) 100
13. 13.🌈 Which colour is rgb(0, 255, 255)? (a) black (b) white (c) blue (d) cyan
14. 14.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) blue (c) black (d) cyan
15. 15.🌈 Which colour of light is strongest in rgb(39, 40, 216)? (a) red (b) green (c) blue
16. 16.🌈 Which colour of light is strongest in rgb(17, 201, 19)? (a) blue (b) green (c) red
17. 17.🌈 Which colour is #ff0000? (a) magenta (b) bright green (c) red (d) blue
18. 18.🌈 Which hex code is magenta? (a) #000000 (b) #ffffff (c) #ff00ff (d) #00ff00
19. 19.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) Z (c) G (d) F
20. 20.🌈 Which colour is rgb(0, 0, 0)? (a) blue (b) cyan (c) red (d) black
21. 21.🌈 Which colour of light is strongest in rgb(31, 223, 121)? (a) green (b) red (c) blue
22. 22.🌈 Which colour is #0000ff? (a) black (b) yellow (c) blue (d) white
23. 23.🌈 Which colour of light is strongest in rgb(220, 5, 62)? (a) red (b) blue (c) green
24. 24.🌈 Which colour is #ffffff? (a) yellow (b) red (c) cyan (d) white
25. 25.🌈 Which colour of light is strongest in rgb(64, 70, 188)? (a) red (b) green (c) blue
26. 26.🌈 In #000079 the blue part is the hex number 79. What is it as a normal number?
27. 27.🌈 Which colour is rgb(255, 255, 255)? (a) bright green (b) cyan (c) yellow (d) white
28. 28.🌈 Which colour of light is strongest in rgb(167, 4, 88)? (a) green (b) blue (c) red
29. 29.🌈 Which colour of light is strongest in rgb(239, 47, 73)? (a) green (b) blue (c) red
30. 30.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
31. 31.🌈 In #890000 the red part is the hex number 89. What is it as a normal number?
32. 32.🌈 Which colour of light is strongest in rgb(106, 114, 175)? (a) blue (b) red (c) green
33. 33.🌈 In #770000 the red part is the hex number 77. What is it as a normal number?
34. 34.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) yellow (c) bright green (d) cyan
35. 35.🌈 Which colour of light is strongest in rgb(23, 243, 108)? (a) blue (b) green (c) red
36. 36.🌈 Which hex code is yellow? (a) #00ffff (b) #00ff00 (c) #ff00ff (d) #ffff00
37. 37.🌈 Which colour of light is strongest in rgb(208, 71, 43)? (a) red (b) green (c) blue
38. 38.🌈 Which colour of light is strongest in rgb(245, 121, 8)? (a) blue (b) green (c) red
39. 39.🌈 Which colour of light is strongest in rgb(233, 80, 73)? (a) green (b) blue (c) red
40. 40.🌈 Which colour of light is strongest in rgb(121, 168, 74)? (a) blue (b) red (c) green

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