CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 186 · 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) green (c) blue (d) black
2. 2.🌈 Which colour is #ffffff? (a) cyan (b) bright green (c) magenta (d) white
3. 3.🌈 Which colour of light is strongest in rgb(220, 42, 26)? (a) green (b) red (c) blue
4. 4.🌈 Which hex code is blue? (a) #ff0000 (b) #00ffff (c) #0000ff (d) #ff00ff
5. 5.🌈 In #004400 the green part is the hex number 44. What is it as a normal number?
6. 6.🌈 Which colour is #ff00ff? (a) white (b) red (c) cyan (d) magenta
7. 7.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) F (c) J (d) Z
8. 8.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) white (c) blue (d) black
9. 9.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 6 (b) 2 (c) 4 (d) 3
10. 10.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 100 (d) 99
11. 11.🌈 Which colour of light is strongest in rgb(137, 81, 160)? (a) red (b) blue (c) green
12. 12.🌈 In #0a0000 the red part is the hex number 0a. What is it as a normal number?
13. 13.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) yellow (c) cyan (d) white
14. 14.🌈 Which colour is #00ffff? (a) red (b) black (c) yellow (d) cyan
15. 15.🌈 Which colour of light is strongest in rgb(132, 205, 28)? (a) green (b) red (c) blue
16. 16.🌈 Which colour of light is strongest in rgb(191, 126, 50)? (a) blue (b) red (c) green
17. 17.🌈 Which hex code is red? (a) #000000 (b) #ffff00 (c) #ff0000 (d) #0000ff
18. 18.🌈 Which colour is #000000? (a) white (b) black (c) magenta (d) yellow
19. 19.🌈 Which colour is rgb(255, 0, 255)? (a) blue (b) red (c) black (d) magenta
20. 20.🌈 Which colour is #ffff00? (a) bright green (b) yellow (c) red (d) blue
21. 21.🌈 Which colour of light is strongest in rgb(47, 243, 14)? (a) red (b) green (c) blue
22. 22.🌈 In #000096 the blue part is the hex number 96. What is it as a normal number?
23. 23.🌈 Which colour of light is strongest in rgb(129, 205, 3)? (a) green (b) red (c) blue
24. 24.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) white (c) blue (d) green
25. 25.🌈 In #be0000 the red part is the hex number be. What is it as a normal number?
26. 26.🌈 Which colour of light is strongest in rgb(27, 245, 125)? (a) green (b) red (c) blue
27. 27.🌈 Which colour of light is strongest in rgb(195, 81, 52)? (a) red (b) green (c) blue
28. 28.🌈 Which hex code is yellow? (a) #0000ff (b) #00ffff (c) #ffff00 (d) #ff0000
29. 29.🌈 Which colour is #00ff00? (a) cyan (b) red (c) yellow (d) bright green
30. 30.🌈 Which colour of light is strongest in rgb(89, 250, 128)? (a) blue (b) red (c) green
31. 31.🌈 Which hex code is magenta? (a) #ff00ff (b) #ff0000 (c) #0000ff (d) #00ff00
32. 32.🌈 Which colour of light is strongest in rgb(237, 29, 83)? (a) green (b) blue (c) red
33. 33.🌈 Which colour of light is strongest in rgb(88, 51, 178)? (a) blue (b) green (c) red
34. 34.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) red (c) magenta (d) blue
35. 35.🌈 Which colour is rgb(255, 0, 0)? (a) red (b) bright green (c) cyan (d) yellow
36. 36.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) white (c) yellow (d) blue
37. 37.🌈 Which colour of light is strongest in rgb(28, 163, 76)? (a) red (b) green (c) blue
38. 38.🌈 In #0000a2 the blue part is the hex number a2. What is it as a normal number?
39. 39.🌈 In #001000 the green part is the hex number 10. What is it as a normal number?
40. 40.🌈 In #00b300 the green part is the hex number b3. What is it as a normal number?

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