CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 356 · 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 #530000 the red part is the hex number 53. What is it as a normal number?
2. 2.🌈 Which hex code is red? (a) #00ffff (b) #ffffff (c) #ff0000 (d) #000000
3. 3.🌈 Which colour is #00ffff? (a) white (b) yellow (c) cyan (d) magenta
4. 4.🌈 Which colour of light is strongest in rgb(21, 154, 77)? (a) red (b) blue (c) green
5. 5.🌈 In #00b400 the green part is the hex number b4. What is it as a normal number?
6. 6.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 4 (c) 6 (d) 2
7. 7.🌈 Which hex code is bright green? (a) #ffff00 (b) #000000 (c) #ff00ff (d) #00ff00
8. 8.🌈 Which colour is rgb(0, 255, 255)? (a) magenta (b) black (c) white (d) cyan
9. 9.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) green (d) black
10. 10.🌈 Which colour is #ffffff? (a) magenta (b) yellow (c) white (d) blue
11. 11.🌈 Which colour of light is strongest in rgb(173, 76, 22)? (a) red (b) blue (c) green
12. 12.🌈 In #f60000 the red part is the hex number f6. What is it as a normal number?
13. 13.🌈 Which hex code is cyan? (a) #00ff00 (b) #ffff00 (c) #ff0000 (d) #00ffff
14. 14.🌈 In #260000 the red part is the hex number 26. What is it as a normal number?
15. 15.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) blue (c) yellow (d) white
16. 16.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) green (d) white
17. 17.🌈 Which colour of light is strongest in rgb(100, 122, 185)? (a) green (b) red (c) blue
18. 18.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 99 (c) 1000 (d) 255
19. 19.🌈 In #00d900 the green part is the hex number d9. What is it as a normal number?
20. 20.🌈 Which colour is #0000ff? (a) red (b) blue (c) black (d) cyan
21. 21.🌈 Which colour is rgb(0, 0, 0)? (a) black (b) red (c) bright green (d) cyan
22. 22.🌈 Which colour of light is strongest in rgb(251, 15, 40)? (a) red (b) green (c) blue
23. 23.🌈 Which colour is #ff0000? (a) blue (b) red (c) black (d) magenta
24. 24.🌈 Hex digits go 0 to 9, then A to which letter? (a) F (b) J (c) G (d) Z
25. 25.🌈 Which colour is rgb(255, 0, 255)? (a) black (b) red (c) magenta (d) cyan
26. 26.🌈 Which colour is #ff00ff? (a) bright green (b) magenta (c) black (d) blue
27. 27.🌈 Which hex code is yellow? (a) #0000ff (b) #00ff00 (c) #ff0000 (d) #ffff00
28. 28.🌈 Which colour of light is strongest in rgb(5, 105, 196)? (a) green (b) red (c) blue
29. 29.🌈 Which colour is #000000? (a) bright green (b) black (c) red (d) cyan
30. 30.🌈 Which colour of light is strongest in rgb(29, 114, 195)? (a) green (b) red (c) blue
31. 31.🌈 In #0000c6 the blue part is the hex number c6. What is it as a normal number?
32. 32.🌈 In #002d00 the green part is the hex number 2d. What is it as a normal number?
33. 33.🌈 Which colour is rgb(0, 0, 255)? (a) black (b) cyan (c) blue (d) white
34. 34.🌈 Which colour of light is strongest in rgb(42, 97, 197)? (a) blue (b) red (c) green
35. 35.🌈 Which colour of light is strongest in rgb(200, 97, 39)? (a) green (b) red (c) blue
36. 36.🌈 In #0000ca the blue part is the hex number ca. What is it as a normal number?
37. 37.🌈 Which colour of light is strongest in rgb(132, 96, 161)? (a) blue (b) green (c) red
38. 38.🌈 Which colour of light is strongest in rgb(40, 29, 150)? (a) blue (b) red (c) green
39. 39.🌈 Which colour is rgb(255, 255, 0)? (a) magenta (b) cyan (c) bright green (d) yellow
40. 40.🌈 In #000097 the blue part is the hex number 97. What is it as a normal number?

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