CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 147 · 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 is #0000ff? (a) blue (b) black (c) magenta (d) bright green
2. 2.🌈 Which colour of light is strongest in rgb(183, 11, 82)? (a) green (b) red (c) blue
3. 3.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) blue (c) red (d) green
4. 4.🌈 Which colour is #ff0000? (a) white (b) magenta (c) red (d) bright green
5. 5.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) magenta (c) yellow (d) white
6. 6.🌈 Which hex code is blue? (a) #ff0000 (b) #ffff00 (c) #0000ff (d) #000000
7. 7.🌈 Which colour of light is strongest in rgb(203, 132, 130)? (a) blue (b) red (c) green
8. 8.🌈 Which hex code is white? (a) #ffff00 (b) #00ffff (c) #ffffff (d) #00ff00
9. 9.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) bright green (c) magenta (d) blue
10. 10.🌈 Which hex code is red? (a) #00ff00 (b) #ffffff (c) #ff00ff (d) #ff0000
11. 11.🌈 In #000000 the blue part is the hex number 00. What is it as a normal number?
12. 12.🌈 Which hex code is bright green? (a) #ffffff (b) #0000ff (c) #ff0000 (d) #00ff00
13. 13.🌈 Which colour is rgb(0, 255, 0)? (a) blue (b) black (c) bright green (d) red
14. 14.🌈 Which colour is #ffffff? (a) cyan (b) magenta (c) white (d) red
15. 15.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) yellow (c) white (d) black
16. 16.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) white (c) cyan (d) magenta
17. 17.🌈 Which colour is #ffff00? (a) magenta (b) blue (c) bright green (d) yellow
18. 18.🌈 Which hex code is black? (a) #ffff00 (b) #0000ff (c) #00ff00 (d) #000000
19. 19.🌈 Which colour of light is strongest in rgb(212, 93, 42)? (a) green (b) red (c) blue
20. 20.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) black (c) red (d) green
21. 21.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) G (d) Z
22. 22.🌈 Which colour of light is strongest in rgb(159, 78, 119)? (a) blue (b) green (c) red
23. 23.🌈 Which colour of light is strongest in rgb(123, 254, 4)? (a) green (b) red (c) blue
24. 24.🌈 Which hex code is yellow? (a) #0000ff (b) #ffffff (c) #ffff00 (d) #ff0000
25. 25.🌈 In #140000 the red part is the hex number 14. What is it as a normal number?
26. 26.🌈 In #a70000 the red part is the hex number a7. What is it as a normal number?
27. 27.🌈 Which colour of light is strongest in rgb(68, 235, 115)? (a) red (b) blue (c) green
28. 28.🌈 In #1d0000 the red part is the hex number 1d. What is it as a normal number?
29. 29.🌈 Which colour is #000000? (a) white (b) yellow (c) cyan (d) black
30. 30.🌈 In #0000e9 the blue part is the hex number e9. What is it as a normal number?
31. 31.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 255 (d) 99
32. 32.🌈 In #0000f8 the blue part is the hex number f8. What is it as a normal number?
33. 33.🌈 Which colour is rgb(255, 0, 0)? (a) bright green (b) black (c) blue (d) red
34. 34.🌈 Which colour of light is strongest in rgb(165, 92, 134)? (a) green (b) red (c) blue
35. 35.🌈 Which colour is #00ff00? (a) yellow (b) bright green (c) cyan (d) blue
36. 36.🌈 Which colour of light is strongest in rgb(235, 128, 85)? (a) green (b) red (c) blue
37. 37.🌈 Which colour is #00ffff? (a) yellow (b) bright green (c) cyan (d) black
38. 38.🌈 Which colour of light is strongest in rgb(3, 88, 157)? (a) green (b) blue (c) red
39. 39.🌈 In #000017 the blue part is the hex number 17. What is it as a normal number?
40. 40.🌈 In #00006e the blue part is the hex number 6e. What is it as a normal number?

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