CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 73 · 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 #ff0000? (a) red (b) blue (c) cyan (d) magenta
2. 2.🌈 In #00f100 the green part is the hex number f1. What is it as a normal number?
3. 3.🌈 Which hex code is bright green? (a) #00ff00 (b) #ffffff (c) #0000ff (d) #ff0000
4. 4.🌈 Which colour is rgb(255, 0, 255)? (a) bright green (b) blue (c) yellow (d) magenta
5. 5.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) white (c) red (d) cyan
6. 6.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) green (c) white (d) blue
7. 7.🌈 Which hex code is white? (a) #ffff00 (b) #00ff00 (c) #ffffff (d) #ff00ff
8. 8.🌈 In #0000f2 the blue part is the hex number f2. What is it as a normal number?
9. 9.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 6 (c) 4 (d) 3
10. 10.🌈 Which colour of light is strongest in rgb(168, 123, 108)? (a) blue (b) red (c) green
11. 11.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) F (d) Z
12. 12.🌈 Which colour of light is strongest in rgb(224, 87, 68)? (a) blue (b) green (c) red
13. 13.🌈 Which hex code is black? (a) #ff0000 (b) #000000 (c) #ff00ff (d) #00ffff
14. 14.🌈 In #950000 the red part is the hex number 95. What is it as a normal number?
15. 15.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) yellow (c) cyan (d) blue
16. 16.🌈 Which colour is #000000? (a) blue (b) magenta (c) black (d) cyan
17. 17.🌈 Which colour is #00ff00? (a) bright green (b) white (c) magenta (d) blue
18. 18.🌈 Which colour is rgb(0, 255, 0)? (a) red (b) blue (c) magenta (d) bright green
19. 19.🌈 Which colour is #ffff00? (a) red (b) magenta (c) black (d) yellow
20. 20.🌈 What is the biggest number one colour can have in rgb()? (a) 255 (b) 100 (c) 1000 (d) 99
21. 21.🌈 In #00e100 the green part is the hex number e1. What is it as a normal number?
22. 22.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) green (c) blue (d) red
23. 23.🌈 Which colour is rgb(0, 0, 255)? (a) red (b) black (c) magenta (d) blue
24. 24.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) white (c) red (d) bright green
25. 25.🌈 Which colour of light is strongest in rgb(124, 121, 186)? (a) green (b) red (c) blue
26. 26.🌈 Which colour of light is strongest in rgb(128, 241, 77)? (a) blue (b) green (c) red
27. 27.🌈 Which colour is #00ffff? (a) red (b) cyan (c) yellow (d) blue
28. 28.🌈 Which colour of light is strongest in rgb(35, 26, 227)? (a) green (b) red (c) blue
29. 29.🌈 Which hex code is red? (a) #00ff00 (b) #000000 (c) #ffffff (d) #ff0000
30. 30.🌈 Which hex code is cyan? (a) #000000 (b) #ff00ff (c) #00ff00 (d) #00ffff
31. 31.🌈 In #440000 the red part is the hex number 44. What is it as a normal number?
32. 32.🌈 Which hex code is blue? (a) #ff00ff (b) #ffffff (c) #0000ff (d) #00ffff
33. 33.🌈 Which colour of light is strongest in rgb(59, 225, 6)? (a) green (b) blue (c) red
34. 34.🌈 In #008400 the green part is the hex number 84. What is it as a normal number?
35. 35.🌈 Which colour of light is strongest in rgb(197, 52, 39)? (a) red (b) blue (c) green
36. 36.🌈 In #7d0000 the red part is the hex number 7d. What is it as a normal number?
37. 37.🌈 In #009b00 the green part is the hex number 9b. What is it as a normal number?
38. 38.🌈 Which colour is #0000ff? (a) blue (b) yellow (c) white (d) black
39. 39.🌈 Which colour is #ffffff? (a) blue (b) cyan (c) magenta (d) white
40. 40.🌈 Which colour of light is strongest in rgb(186, 85, 21)? (a) green (b) blue (c) red

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