CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 130 · 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(114, 111, 168)? (a) green (b) red (c) blue
2. 2.🌈 In #3b0000 the red part is the hex number 3b. What is it as a normal number?
3. 3.🌈 Which colour is #ffff00? (a) bright green (b) red (c) magenta (d) yellow
4. 4.🌈 Which hex code is cyan? (a) #ffffff (b) #00ffff (c) #00ff00 (d) #ff00ff
5. 5.🌈 Which colour is #00ff00? (a) cyan (b) bright green (c) magenta (d) black
6. 6.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 100 (c) 1000 (d) 255
7. 7.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #ffff00 (d) #00ffff
8. 8.🌈 Which colour is #ffffff? (a) bright green (b) white (c) red (d) blue
9. 9.🌈 Which colour is #ff0000? (a) yellow (b) bright green (c) red (d) blue
10. 10.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) Z (c) F (d) J
11. 11.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 4 (b) 6 (c) 3 (d) 2
12. 12.🌈 Which hex code is white? (a) #ffffff (b) #00ff00 (c) #ffff00 (d) #ff00ff
13. 13.🌈 Which hex code is red? (a) #0000ff (b) #00ffff (c) #ff0000 (d) #000000
14. 14.🌈 Which colour of light is strongest in rgb(133, 19, 189)? (a) red (b) blue (c) green
15. 15.🌈 In #4a0000 the red part is the hex number 4a. What is it as a normal number?
16. 16.🌈 Which colour is rgb(255, 0, 255)? (a) red (b) blue (c) magenta (d) white
17. 17.🌈 In #003600 the green part is the hex number 36. What is it as a normal number?
18. 18.🌈 Which colour is #00ffff? (a) white (b) magenta (c) yellow (d) cyan
19. 19.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) green (d) white
20. 20.🌈 Which colour of light is strongest in rgb(159, 25, 69)? (a) blue (b) red (c) green
21. 21.🌈 Which colour of light is strongest in rgb(40, 219, 29)? (a) red (b) blue (c) green
22. 22.🌈 Which colour of light is strongest in rgb(25, 114, 240)? (a) green (b) red (c) blue
23. 23.🌈 Which hex code is yellow? (a) #ffff00 (b) #000000 (c) #00ffff (d) #ff00ff
24. 24.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) red (c) blue (d) black
25. 25.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) bright green (c) white (d) magenta
26. 26.🌈 In #00000f the blue part is the hex number 0f. What is it as a normal number?
27. 27.🌈 Which hex code is blue? (a) #0000ff (b) #000000 (c) #ff00ff (d) #ff0000
28. 28.🌈 Which hex code is magenta? (a) #00ff00 (b) #ff00ff (c) #00ffff (d) #0000ff
29. 29.🌈 Which colour is #000000? (a) yellow (b) white (c) black (d) magenta
30. 30.🌈 Which hex code is bright green? (a) #000000 (b) #00ffff (c) #0000ff (d) #00ff00
31. 31.🌈 Which colour is #ff00ff? (a) white (b) bright green (c) magenta (d) red
32. 32.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) black (c) red (d) blue
33. 33.🌈 In #001c00 the green part is the hex number 1c. What is it as a normal number?
34. 34.🌈 In #0000f8 the blue part is the hex number f8. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(209, 111, 100)? (a) blue (b) green (c) red
36. 36.🌈 In #0000d2 the blue part is the hex number d2. What is it as a normal number?
37. 37.🌈 Which colour is rgb(0, 255, 255)? (a) cyan (b) magenta (c) yellow (d) white
38. 38.🌈 Which colour of light is strongest in rgb(5, 114, 253)? (a) red (b) blue (c) green
39. 39.🌈 In #003800 the green part is the hex number 38. What is it as a normal number?
40. 40.🌈 Which colour of light is strongest in rgb(246, 106, 0)? (a) green (b) blue (c) red

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