CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 16 · 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(200, 85, 118)? (a) green (b) blue (c) red
2. 2.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) black (d) red
3. 3.🌈 Which colour of light is strongest in rgb(133, 244, 7)? (a) green (b) blue (c) red
4. 4.🌈 Which colour of light is strongest in rgb(62, 46, 152)? (a) blue (b) red (c) green
5. 5.🌈 In #005f00 the green part is the hex number 5f. What is it as a normal number?
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) green (d) blue
7. 7.🌈 Which hex code is yellow? (a) #0000ff (b) #ff00ff (c) #ff0000 (d) #ffff00
8. 8.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) bright green (c) white (d) blue
9. 9.🌈 In #007300 the green part is the hex number 73. What is it as a normal number?
10. 10.🌈 Which colour is #ffff00? (a) black (b) red (c) yellow (d) blue
11. 11.🌈 Which hex code is black? (a) #00ff00 (b) #00ffff (c) #ffff00 (d) #000000
12. 12.🌈 In #0000be the blue part is the hex number be. What is it as a normal number?
13. 13.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 255 (d) 100
14. 14.🌈 Which colour is rgb(0, 255, 255)? (a) black (b) white (c) magenta (d) cyan
15. 15.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) G (d) Z
16. 16.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
17. 17.🌈 Which hex code is magenta? (a) #ff00ff (b) #000000 (c) #ff0000 (d) #ffff00
18. 18.🌈 Which hex code is red? (a) #ff00ff (b) #ffff00 (c) #ff0000 (d) #00ffff
19. 19.🌈 Which colour of light is strongest in rgb(116, 25, 247)? (a) blue (b) green (c) red
20. 20.🌈 Which colour of light is strongest in rgb(159, 45, 77)? (a) blue (b) green (c) red
21. 21.🌈 Which colour is #00ff00? (a) black (b) bright green (c) magenta (d) cyan
22. 22.🌈 In #d30000 the red part is the hex number d3. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(47, 91, 210)? (a) blue (b) green (c) red
24. 24.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) red (c) white (d) yellow
25. 25.🌈 Which colour is #ffffff? (a) bright green (b) white (c) red (d) blue
26. 26.🌈 Which colour is rgb(255, 0, 255)? (a) magenta (b) black (c) blue (d) bright green
27. 27.🌈 Which colour is #ff00ff? (a) magenta (b) black (c) red (d) yellow
28. 28.🌈 Which colour of light is strongest in rgb(197, 7, 49)? (a) red (b) blue (c) green
29. 29.🌈 Which colour is #ff0000? (a) red (b) white (c) magenta (d) cyan
30. 30.🌈 In #0000ea the blue part is the hex number ea. What is it as a normal number?
31. 31.🌈 In #180000 the red part is the hex number 18. What is it as a normal number?
32. 32.🌈 In #450000 the red part is the hex number 45. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(106, 243, 136)? (a) blue (b) red (c) green
34. 34.🌈 Which colour is rgb(0, 0, 255)? (a) red (b) cyan (c) black (d) blue
35. 35.🌈 Which colour of light is strongest in rgb(211, 84, 101)? (a) green (b) red (c) blue
36. 36.🌈 In #7e0000 the red part is the hex number 7e. What is it as a normal number?
37. 37.🌈 Which colour is #00ffff? (a) magenta (b) bright green (c) cyan (d) red
38. 38.🌈 Which colour is #0000ff? (a) yellow (b) red (c) blue (d) white
39. 39.🌈 Which hex code is blue? (a) #000000 (b) #ff0000 (c) #ffff00 (d) #0000ff
40. 40.🌈 Which colour of light is strongest in rgb(121, 245, 104)? (a) green (b) blue (c) red

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