CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 168 · 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(253, 23, 27)? (a) green (b) blue (c) red
2. 2.🌈 Which colour is #ff0000? (a) red (b) bright green (c) magenta (d) blue
3. 3.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) yellow (c) magenta (d) black
4. 4.🌈 Which colour is rgb(0, 255, 255)? (a) bright green (b) white (c) blue (d) cyan
5. 5.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) cyan (c) yellow (d) blue
6. 6.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
7. 7.🌈 Which hex code is yellow? (a) #00ffff (b) #000000 (c) #ff0000 (d) #ffff00
8. 8.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) cyan (c) magenta (d) white
9. 9.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) bright green (c) black (d) cyan
10. 10.🌈 Which colour is rgb(0, 0, 0)? (a) blue (b) yellow (c) magenta (d) black
11. 11.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
12. 12.🌈 Which colour is #000000? (a) bright green (b) yellow (c) black (d) red
13. 13.🌈 Which colour of light is strongest in rgb(16, 43, 201)? (a) green (b) red (c) blue
14. 14.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) blue (c) black (d) yellow
15. 15.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) blue (d) white
16. 16.🌈 In #00002a the blue part is the hex number 2a. What is it as a normal number?
17. 17.🌈 Which colour of light is strongest in rgb(16, 209, 100)? (a) blue (b) green (c) red
18. 18.🌈 In #0000b8 the blue part is the hex number b8. What is it as a normal number?
19. 19.🌈 Which colour is #ff00ff? (a) black (b) magenta (c) blue (d) cyan
20. 20.🌈 Which colour of light is strongest in rgb(158, 20, 114)? (a) blue (b) red (c) green
21. 21.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) red (c) bright green (d) white
22. 22.🌈 In #006500 the green part is the hex number 65. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(28, 0, 195)? (a) green (b) blue (c) red
24. 24.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 3 (c) 4 (d) 2
25. 25.🌈 Which colour is #00ffff? (a) magenta (b) red (c) cyan (d) black
26. 26.🌈 Which hex code is red? (a) #ff0000 (b) #00ff00 (c) #ff00ff (d) #00ffff
27. 27.🌈 In #0000bb the blue part is the hex number bb. What is it as a normal number?
28. 28.🌈 In #5f0000 the red part is the hex number 5f. What is it as a normal number?
29. 29.🌈 Which hex code is cyan? (a) #ffff00 (b) #ff0000 (c) #00ffff (d) #0000ff
30. 30.🌈 Which colour is #0000ff? (a) blue (b) yellow (c) bright green (d) cyan
31. 31.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) Z (c) G (d) F
32. 32.🌈 In #003300 the green part is the hex number 33. What is it as a normal number?
33. 33.🌈 Which colour of light is strongest in rgb(238, 104, 98)? (a) blue (b) red (c) green
34. 34.🌈 In #000100 the green part is the hex number 01. What is it as a normal number?
35. 35.🌈 Which colour is #ffff00? (a) white (b) blue (c) bright green (d) yellow
36. 36.🌈 Which hex code is white? (a) #00ffff (b) #ffffff (c) #ffff00 (d) #00ff00
37. 37.🌈 Which colour is #ffffff? (a) blue (b) bright green (c) white (d) cyan
38. 38.🌈 In #0000ad the blue part is the hex number ad. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(0, 95, 180)? (a) green (b) red (c) blue
40. 40.🌈 Which colour of light is strongest in rgb(127, 247, 14)? (a) blue (b) red (c) green

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