CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 234 · 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.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) black (d) green
2. 2.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) magenta (c) white (d) bright green
3. 3.🌈 Hex digits go 0 to 9, then A to which letter? (a) Z (b) J (c) F (d) G
4. 4.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) black (c) magenta (d) yellow
5. 5.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 255 (d) 1000
6. 6.🌈 In #002700 the green part is the hex number 27. What is it as a normal number?
7. 7.🌈 Which colour is #00ff00? (a) yellow (b) bright green (c) cyan (d) blue
8. 8.🌈 Which colour of light is strongest in rgb(57, 221, 26)? (a) red (b) blue (c) green
9. 9.🌈 Which colour is #ff00ff? (a) bright green (b) red (c) white (d) magenta
10. 10.🌈 Which colour is #ffff00? (a) red (b) yellow (c) bright green (d) blue
11. 11.🌈 Which colour of light is strongest in rgb(35, 92, 179)? (a) green (b) red (c) blue
12. 12.🌈 Which colour is #00ffff? (a) bright green (b) yellow (c) cyan (d) white
13. 13.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) yellow (c) red (d) bright green
14. 14.🌈 Which colour of light is strongest in rgb(0, 210, 12)? (a) blue (b) red (c) green
15. 15.🌈 Which colour is #ff0000? (a) black (b) bright green (c) white (d) red
16. 16.🌈 In #00004a the blue part is the hex number 4a. What is it as a normal number?
17. 17.🌈 Which colour of light is strongest in rgb(6, 55, 255)? (a) blue (b) green (c) red
18. 18.🌈 Which colour is rgb(0, 0, 255)? (a) black (b) red (c) bright green (d) blue
19. 19.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 3 (c) 6 (d) 4
20. 20.🌈 Which hex code is cyan? (a) #ffff00 (b) #000000 (c) #ffffff (d) #00ffff
21. 21.🌈 Which colour of light is strongest in rgb(225, 42, 132)? (a) red (b) blue (c) green
22. 22.🌈 Which hex code is blue? (a) #ffff00 (b) #ffffff (c) #000000 (d) #0000ff
23. 23.🌈 Which hex code is black? (a) #0000ff (b) #000000 (c) #00ff00 (d) #ffffff
24. 24.🌈 Which colour of light is strongest in rgb(203, 55, 54)? (a) green (b) red (c) blue
25. 25.🌈 Which colour is rgb(255, 255, 0)? (a) cyan (b) red (c) black (d) yellow
26. 26.🌈 Which colour is rgb(0, 0, 0)? (a) magenta (b) bright green (c) black (d) blue
27. 27.🌈 Which colour of light is strongest in rgb(243, 38, 23)? (a) red (b) green (c) blue
28. 28.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) green (c) red (d) white
29. 29.🌈 Which colour is #0000ff? (a) red (b) magenta (c) cyan (d) blue
30. 30.🌈 Which colour of light is strongest in rgb(169, 8, 64)? (a) red (b) green (c) blue
31. 31.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) white (c) bright green (d) magenta
32. 32.🌈 Which colour of light is strongest in rgb(161, 71, 125)? (a) red (b) blue (c) green
33. 33.🌈 Which colour of light is strongest in rgb(188, 9, 57)? (a) red (b) blue (c) green
34. 34.🌈 Which hex code is magenta? (a) #ff00ff (b) #000000 (c) #00ffff (d) #0000ff
35. 35.🌈 Which colour of light is strongest in rgb(24, 114, 170)? (a) red (b) blue (c) green
36. 36.🌈 In #00003f the blue part is the hex number 3f. What is it as a normal number?
37. 37.🌈 In #0000ca the blue part is the hex number ca. What is it as a normal number?
38. 38.🌈 Which hex code is yellow? (a) #000000 (b) #ffff00 (c) #0000ff (d) #ff0000
39. 39.🌈 Which colour of light is strongest in rgb(98, 2, 160)? (a) red (b) blue (c) green
40. 40.🌈 Which colour of light is strongest in rgb(0, 37, 248)? (a) red (b) blue (c) green

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