CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 278 · 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 hex code is cyan? (a) #00ffff (b) #000000 (c) #0000ff (d) #ff00ff
2. 2.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z
3. 3.🌈 Which hex code is blue? (a) #ff0000 (b) #ff00ff (c) #0000ff (d) #ffff00
4. 4.🌈 Which colour is #ff0000? (a) magenta (b) bright green (c) yellow (d) red
5. 5.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 3 (d) 4
6. 6.🌈 Which colour of light is strongest in rgb(233, 37, 107)? (a) green (b) blue (c) red
7. 7.🌈 Which colour of light is strongest in rgb(238, 117, 98)? (a) green (b) red (c) blue
8. 8.🌈 Which hex code is yellow? (a) #ffffff (b) #ff00ff (c) #ffff00 (d) #00ff00
9. 9.🌈 In #007400 the green part is the hex number 74. What is it as a normal number?
10. 10.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 100 (c) 255 (d) 99
11. 11.🌈 Which hex code is white? (a) #0000ff (b) #00ff00 (c) #00ffff (d) #ffffff
12. 12.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) blue (d) black
13. 13.🌈 Which hex code is magenta? (a) #ff00ff (b) #ffffff (c) #000000 (d) #0000ff
14. 14.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) yellow (c) red (d) black
15. 15.🌈 Which hex code is red? (a) #00ffff (b) #ffffff (c) #000000 (d) #ff0000
16. 16.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) cyan (c) yellow (d) blue
17. 17.🌈 Which colour is #0000ff? (a) black (b) red (c) blue (d) yellow
18. 18.🌈 Which colour is rgb(0, 0, 255)? (a) white (b) blue (c) red (d) magenta
19. 19.🌈 Which hex code is bright green? (a) #ffff00 (b) #00ffff (c) #00ff00 (d) #ff0000
20. 20.🌈 Which colour is #00ff00? (a) blue (b) bright green (c) magenta (d) cyan
21. 21.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) red (c) cyan (d) magenta
22. 22.🌈 Which colour is rgb(255, 255, 255)? (a) red (b) bright green (c) black (d) white
23. 23.🌈 Which colour of light is strongest in rgb(204, 59, 27)? (a) red (b) blue (c) green
24. 24.🌈 In #4b0000 the red part is the hex number 4b. What is it as a normal number?
25. 25.🌈 Which colour is rgb(0, 255, 255)? (a) yellow (b) cyan (c) bright green (d) red
26. 26.🌈 Which colour is #00ffff? (a) cyan (b) yellow (c) black (d) blue
27. 27.🌈 Which colour is #ffffff? (a) blue (b) magenta (c) cyan (d) white
28. 28.🌈 In #0000d5 the blue part is the hex number d5. What is it as a normal number?
29. 29.🌈 Which colour is rgb(0, 255, 0)? (a) black (b) magenta (c) yellow (d) bright green
30. 30.🌈 In #000011 the blue part is the hex number 11. What is it as a normal number?
31. 31.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) blue (c) white (d) red
32. 32.🌈 Which colour of light is strongest in rgb(221, 95, 0)? (a) red (b) green (c) blue
33. 33.🌈 Which colour of light is strongest in rgb(3, 30, 197)? (a) blue (b) green (c) red
34. 34.🌈 In #0000ac the blue part is the hex number ac. What is it as a normal number?
35. 35.🌈 In #520000 the red part is the hex number 52. What is it as a normal number?
36. 36.🌈 In #001500 the green part is the hex number 15. What is it as a normal number?
37. 37.🌈 Which colour of light is strongest in rgb(252, 31, 92)? (a) green (b) red (c) blue
38. 38.🌈 Which colour of light is strongest in rgb(44, 162, 37)? (a) green (b) red (c) blue
39. 39.🌈 Which hex code is black? (a) #ffff00 (b) #ffffff (c) #000000 (d) #0000ff
40. 40.🌈 In #fe0000 the red part is the hex number fe. What is it as a normal number?

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