CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 28 · 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 #0000ff? (a) magenta (b) yellow (c) blue (d) black
2. 2.🌈 In #002d00 the green part is the hex number 2d. What is it as a normal number?
3. 3.🌈 Which colour is rgb(0, 255, 0)? (a) magenta (b) blue (c) yellow (d) bright green
4. 4.🌈 Which hex code is bright green? (a) #ff00ff (b) #ff0000 (c) #00ff00 (d) #0000ff
5. 5.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 4 (c) 6 (d) 2
6. 6.🌈 Which colour is rgb(255, 255, 0)? (a) bright green (b) yellow (c) blue (d) magenta
7. 7.🌈 Which colour is #ff00ff? (a) bright green (b) magenta (c) blue (d) cyan
8. 8.🌈 Which colour is #ffffff? (a) black (b) magenta (c) white (d) yellow
9. 9.🌈 Which colour of light is strongest in rgb(111, 123, 181)? (a) blue (b) green (c) red
10. 10.🌈 In #eb0000 the red part is the hex number eb. What is it as a normal number?
11. 11.🌈 What is the biggest number one colour can have in rgb()? (a) 100 (b) 1000 (c) 99 (d) 255
12. 12.🌈 In #00ca00 the green part is the hex number ca. What is it as a normal number?
13. 13.🌈 In #000019 the blue part is the hex number 19. What is it as a normal number?
14. 14.🌈 Which hex code is magenta? (a) #0000ff (b) #00ff00 (c) #000000 (d) #ff00ff
15. 15.🌈 In #002b00 the green part is the hex number 2b. What is it as a normal number?
16. 16.🌈 Which colour is #ff0000? (a) bright green (b) yellow (c) red (d) cyan
17. 17.🌈 In #rrggbb, which colour do the first two digits give? (a) black (b) red (c) blue (d) green
18. 18.🌈 In #bc0000 the red part is the hex number bc. What is it as a normal number?
19. 19.🌈 Which colour is #ffff00? (a) black (b) yellow (c) white (d) red
20. 20.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) black (c) blue (d) yellow
21. 21.🌈 Which colour is rgb(255, 0, 0)? (a) white (b) red (c) bright green (d) black
22. 22.🌈 Which hex code is blue? (a) #ffff00 (b) #0000ff (c) #00ff00 (d) #000000
23. 23.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) F (d) Z
24. 24.🌈 Which colour of light is strongest in rgb(177, 41, 71)? (a) blue (b) red (c) green
25. 25.🌈 In #750000 the red part is the hex number 75. What is it as a normal number?
26. 26.🌈 In #rrggbb, which colour do the last two digits give? (a) green (b) white (c) red (d) blue
27. 27.🌈 Which colour of light is strongest in rgb(93, 231, 92)? (a) blue (b) red (c) green
28. 28.🌈 Which hex code is white? (a) #ffffff (b) #00ffff (c) #00ff00 (d) #000000
29. 29.🌈 Which colour is rgb(255, 255, 255)? (a) yellow (b) white (c) cyan (d) black
30. 30.🌈 Which colour of light is strongest in rgb(38, 23, 175)? (a) green (b) red (c) blue
31. 31.🌈 In #d00000 the red part is the hex number d0. What is it as a normal number?
32. 32.🌈 Which colour is #00ff00? (a) yellow (b) bright green (c) blue (d) white
33. 33.🌈 Which colour of light is strongest in rgb(14, 99, 163)? (a) red (b) blue (c) green
34. 34.🌈 Which colour is #000000? (a) blue (b) red (c) cyan (d) black
35. 35.🌈 Which colour of light is strongest in rgb(238, 137, 95)? (a) blue (b) green (c) red
36. 36.🌈 Which colour of light is strongest in rgb(3, 221, 50)? (a) red (b) green (c) blue
37. 37.🌈 Which colour is rgb(0, 255, 255)? (a) black (b) cyan (c) yellow (d) magenta
38. 38.🌈 In #740000 the red part is the hex number 74. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(34, 222, 128)? (a) blue (b) red (c) green
40. 40.🌈 Which colour is #00ffff? (a) blue (b) cyan (c) black (d) magenta

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