CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 243 · 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 last two digits give? (a) blue (b) red (c) green (d) white
2. 2.🌈 Which colour is #ffff00? (a) bright green (b) white (c) yellow (d) blue
3. 3.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 1000 (c) 99 (d) 100
4. 4.🌈 Which colour of light is strongest in rgb(178, 0, 0)? (a) blue (b) green (c) red
5. 5.🌈 Which colour is rgb(255, 0, 255)? (a) yellow (b) blue (c) cyan (d) magenta
6. 6.🌈 Which colour of light is strongest in rgb(200, 97, 125)? (a) red (b) green (c) blue
7. 7.🌈 Which colour is rgb(255, 255, 0)? (a) cyan (b) yellow (c) magenta (d) black
8. 8.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) F (d) Z
9. 9.🌈 Which colour is #0000ff? (a) black (b) blue (c) red (d) cyan
10. 10.🌈 In #005b00 the green part is the hex number 5b. What is it as a normal number?
11. 11.🌈 In #rrggbb, which colour do the first two digits give? (a) green (b) blue (c) red (d) black
12. 12.🌈 Which colour is #ff00ff? (a) white (b) red (c) magenta (d) yellow
13. 13.🌈 Which hex code is blue? (a) #ffffff (b) #ffff00 (c) #00ffff (d) #0000ff
14. 14.🌈 Which colour is #ff0000? (a) black (b) white (c) red (d) bright green
15. 15.🌈 In #e00000 the red part is the hex number e0. What is it as a normal number?
16. 16.🌈 Which colour is rgb(0, 255, 0)? (a) bright green (b) white (c) black (d) red
17. 17.🌈 Which colour of light is strongest in rgb(110, 248, 48)? (a) red (b) blue (c) green
18. 18.🌈 In #a10000 the red part is the hex number a1. What is it as a normal number?
19. 19.🌈 Which hex code is red? (a) #0000ff (b) #ff0000 (c) #000000 (d) #00ff00
20. 20.🌈 In #004a00 the green part is the hex number 4a. What is it as a normal number?
21. 21.🌈 In #000033 the blue part is the hex number 33. What is it as a normal number?
22. 22.🌈 Which colour is rgb(255, 255, 255)? (a) cyan (b) white (c) blue (d) red
23. 23.🌈 Which colour of light is strongest in rgb(56, 179, 64)? (a) green (b) blue (c) red
24. 24.🌈 Which colour is #ffffff? (a) blue (b) red (c) magenta (d) white
25. 25.🌈 Which colour is rgb(0, 0, 255)? (a) cyan (b) black (c) bright green (d) blue
26. 26.🌈 Which colour of light is strongest in rgb(177, 116, 134)? (a) red (b) blue (c) green
27. 27.🌈 In #00d200 the green part is the hex number d2. What is it as a normal number?
28. 28.🌈 Which colour is #00ffff? (a) red (b) magenta (c) blue (d) cyan
29. 29.🌈 Which colour is #000000? (a) cyan (b) black (c) magenta (d) blue
30. 30.🌈 Which colour of light is strongest in rgb(237, 116, 89)? (a) red (b) blue (c) green
31. 31.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 3 (d) 4
32. 32.🌈 Which colour of light is strongest in rgb(189, 23, 15)? (a) green (b) red (c) blue
33. 33.🌈 Which colour is rgb(0, 255, 255)? (a) blue (b) cyan (c) black (d) red
34. 34.🌈 Which hex code is magenta? (a) #00ffff (b) #ff00ff (c) #0000ff (d) #00ff00
35. 35.🌈 Which colour of light is strongest in rgb(127, 212, 0)? (a) red (b) green (c) blue
36. 36.🌈 Which colour of light is strongest in rgb(31, 12, 234)? (a) red (b) blue (c) green
37. 37.🌈 Which colour of light is strongest in rgb(47, 102, 219)? (a) blue (b) green (c) red
38. 38.🌈 Which colour is rgb(255, 0, 0)? (a) blue (b) white (c) magenta (d) red
39. 39.🌈 In #007c00 the green part is the hex number 7c. What is it as a normal number?
40. 40.🌈 In #002a00 the green part is the hex number 2a. What is it as a normal number?

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