CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 136 · 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 rgb(0, 0, 255)? (a) cyan (b) blue (c) white (d) yellow
2. 2.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) J (d) F
3. 3.🌈 Which hex code is cyan? (a) #00ff00 (b) #00ffff (c) #000000 (d) #ffff00
4. 4.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 2 (c) 4 (d) 6
5. 5.🌈 Which colour is #ffffff? (a) red (b) cyan (c) blue (d) white
6. 6.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) magenta (c) black (d) bright green
7. 7.🌈 In #180000 the red part is the hex number 18. What is it as a normal number?
8. 8.🌈 In #rrggbb, which colour do the last two digits give? (a) white (b) red (c) blue (d) green
9. 9.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 255 (c) 99 (d) 100
10. 10.🌈 Which colour is #00ff00? (a) red (b) magenta (c) white (d) bright green
11. 11.🌈 Which colour of light is strongest in rgb(216, 30, 119)? (a) red (b) blue (c) green
12. 12.🌈 Which hex code is red? (a) #000000 (b) #ff0000 (c) #00ff00 (d) #0000ff
13. 13.🌈 In #rrggbb, which colour do the first two digits give? (a) blue (b) green (c) black (d) red
14. 14.🌈 Which colour is #0000ff? (a) blue (b) white (c) black (d) bright green
15. 15.🌈 Which colour is rgb(255, 255, 0)? (a) red (b) yellow (c) cyan (d) black
16. 16.🌈 In #000700 the green part is the hex number 07. What is it as a normal number?
17. 17.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) red (c) bright green (d) white
18. 18.🌈 In #390000 the red part is the hex number 39. What is it as a normal number?
19. 19.🌈 Which colour of light is strongest in rgb(61, 62, 152)? (a) green (b) blue (c) red
20. 20.🌈 Which colour of light is strongest in rgb(6, 158, 37)? (a) blue (b) red (c) green
21. 21.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) red (c) cyan (d) magenta
22. 22.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) bright green (c) blue (d) yellow
23. 23.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #00ff00 (d) #ffff00
24. 24.🌈 Which colour is #ff0000? (a) yellow (b) red (c) black (d) magenta
25. 25.🌈 Which colour is #ff00ff? (a) magenta (b) cyan (c) white (d) yellow
26. 26.🌈 In #003b00 the green part is the hex number 3b. What is it as a normal number?
27. 27.🌈 Which hex code is white? (a) #000000 (b) #ff00ff (c) #00ffff (d) #ffffff
28. 28.🌈 In #0d0000 the red part is the hex number 0d. What is it as a normal number?
29. 29.🌈 In #000046 the blue part is the hex number 46. What is it as a normal number?
30. 30.🌈 Which hex code is yellow? (a) #00ffff (b) #ff00ff (c) #00ff00 (d) #ffff00
31. 31.🌈 Which hex code is bright green? (a) #00ffff (b) #00ff00 (c) #ffff00 (d) #0000ff
32. 32.🌈 Which colour is #ffff00? (a) red (b) magenta (c) yellow (d) cyan
33. 33.🌈 Which colour of light is strongest in rgb(8, 224, 51)? (a) blue (b) green (c) red
34. 34.🌈 Which colour is #00ffff? (a) white (b) red (c) blue (d) cyan
35. 35.🌈 In #ec0000 the red part is the hex number ec. What is it as a normal number?
36. 36.🌈 Which colour is #000000? (a) cyan (b) white (c) black (d) blue
37. 37.🌈 In #0000d8 the blue part is the hex number d8. What is it as a normal number?
38. 38.🌈 Which colour of light is strongest in rgb(76, 72, 236)? (a) green (b) red (c) blue
39. 39.🌈 Which hex code is magenta? (a) #ffffff (b) #ffff00 (c) #00ffff (d) #ff00ff
40. 40.🌈 Which colour of light is strongest in rgb(7, 181, 12)? (a) red (b) blue (c) green

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