CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 66 · 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(105, 118, 204)? (a) green (b) blue (c) red
2. 2.🌈 Which colour is #0000ff? (a) black (b) red (c) yellow (d) blue
3. 3.🌈 Which hex code is red? (a) #ff0000 (b) #ffff00 (c) #00ffff (d) #ffffff
4. 4.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) yellow (c) black (d) cyan
5. 5.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) red (c) black (d) blue
6. 6.🌈 Which colour is rgb(0, 0, 0)? (a) red (b) cyan (c) black (d) white
7. 7.🌈 Which colour of light is strongest in rgb(34, 118, 172)? (a) red (b) blue (c) green
8. 8.🌈 In #00e400 the green part is the hex number e4. What is it as a normal number?
9. 9.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) bright green (c) white (d) red
10. 10.🌈 Which colour is #ffff00? (a) cyan (b) red (c) magenta (d) yellow
11. 11.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
12. 12.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 99 (c) 1000 (d) 100
13. 13.🌈 Which colour of light is strongest in rgb(107, 31, 180)? (a) red (b) green (c) blue
14. 14.🌈 Which colour is #00ffff? (a) white (b) magenta (c) cyan (d) bright green
15. 15.🌈 In #0000d1 the blue part is the hex number d1. What is it as a normal number?
16. 16.🌈 Which colour is rgb(255, 255, 0)? (a) black (b) yellow (c) magenta (d) bright green
17. 17.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) J (d) F
18. 18.🌈 Which hex code is yellow? (a) #ff0000 (b) #ff00ff (c) #ffff00 (d) #ffffff
19. 19.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) bright green (c) magenta (d) red
20. 20.🌈 In #000f00 the green part is the hex number 0f. What is it as a normal number?
21. 21.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) magenta (c) cyan (d) bright green
22. 22.🌈 Which colour is #ff0000? (a) blue (b) black (c) bright green (d) red
23. 23.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) white (d) green
24. 24.🌈 Which hex code is magenta? (a) #000000 (b) #00ff00 (c) #ff00ff (d) #ff0000
25. 25.🌈 Which colour is #ffffff? (a) bright green (b) black (c) blue (d) white
26. 26.🌈 Which colour is #000000? (a) white (b) bright green (c) yellow (d) black
27. 27.🌈 Which hex code is blue? (a) #00ff00 (b) #ff00ff (c) #0000ff (d) #ffff00
28. 28.🌈 Which hex code is bright green? (a) #0000ff (b) #ffff00 (c) #00ff00 (d) #000000
29. 29.🌈 Which colour of light is strongest in rgb(163, 138, 82)? (a) red (b) blue (c) green
30. 30.🌈 Which hex code is cyan? (a) #00ff00 (b) #ff00ff (c) #00ffff (d) #ff0000
31. 31.🌈 Which colour of light is strongest in rgb(203, 41, 131)? (a) green (b) red (c) blue
32. 32.🌈 Which colour of light is strongest in rgb(68, 44, 159)? (a) green (b) red (c) blue
33. 33.🌈 Which colour of light is strongest in rgb(251, 117, 92)? (a) green (b) red (c) blue
34. 34.🌈 In #00003f the blue part is the hex number 3f. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(199, 23, 119)? (a) green (b) blue (c) red
36. 36.🌈 Which colour of light is strongest in rgb(242, 0, 74)? (a) blue (b) red (c) green
37. 37.🌈 In #460000 the red part is the hex number 46. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(218, 84, 28)? (a) green (b) red (c) blue
39. 39.🌈 Which colour is rgb(0, 0, 255)? (a) blue (b) white (c) magenta (d) cyan
40. 40.🌈 In #830000 the red part is the hex number 83. What is it as a normal number?

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