CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 158 · 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(78, 118, 237)? (a) red (b) green (c) blue
2. 2.🌈 Which colour is #0000ff? (a) black (b) blue (c) cyan (d) bright green
3. 3.🌈 Which hex code is cyan? (a) #ffffff (b) #0000ff (c) #00ffff (d) #00ff00
4. 4.🌈 Which colour is rgb(0, 0, 255)? (a) magenta (b) black (c) blue (d) red
5. 5.🌈 Hex digits go 0 to 9, then A to which letter? (a) G (b) J (c) Z (d) F
6. 6.🌈 Which hex code is red? (a) #ffffff (b) #00ff00 (c) #000000 (d) #ff0000
7. 7.🌈 Which colour is #ffff00? (a) blue (b) cyan (c) bright green (d) yellow
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) blue (c) green (d) black
9. 9.🌈 In #rrggbb, which colour do the last two digits give? (a) red (b) blue (c) white (d) green
10. 10.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 2 (b) 4 (c) 6 (d) 3
11. 11.🌈 In #990000 the red part is the hex number 99. What is it as a normal number?
12. 12.🌈 Which colour is #000000? (a) cyan (b) black (c) magenta (d) red
13. 13.🌈 Which colour of light is strongest in rgb(34, 185, 74)? (a) green (b) blue (c) red
14. 14.🌈 Which colour is rgb(255, 255, 0)? (a) yellow (b) black (c) cyan (d) magenta
15. 15.🌈 In #ad0000 the red part is the hex number ad. What is it as a normal number?
16. 16.🌈 Which colour is #ffffff? (a) magenta (b) white (c) blue (d) cyan
17. 17.🌈 Which colour of light is strongest in rgb(48, 116, 241)? (a) green (b) red (c) blue
18. 18.🌈 Which colour of light is strongest in rgb(114, 153, 93)? (a) green (b) blue (c) red
19. 19.🌈 Which colour of light is strongest in rgb(78, 210, 2)? (a) green (b) blue (c) red
20. 20.🌈 Which colour is rgb(0, 255, 0)? (a) white (b) yellow (c) red (d) bright green
21. 21.🌈 Which hex code is yellow? (a) #ff0000 (b) #ffff00 (c) #0000ff (d) #00ffff
22. 22.🌈 Which colour of light is strongest in rgb(64, 250, 70)? (a) green (b) red (c) blue
23. 23.🌈 Which hex code is magenta? (a) #ff00ff (b) #ff0000 (c) #0000ff (d) #000000
24. 24.🌈 In #1c0000 the red part is the hex number 1c. What is it as a normal number?
25. 25.🌈 What is the biggest number one colour can have in rgb()? (a) 99 (b) 1000 (c) 255 (d) 100
26. 26.🌈 Which colour is #ff0000? (a) bright green (b) blue (c) red (d) magenta
27. 27.🌈 Which hex code is bright green? (a) #ffffff (b) #ffff00 (c) #00ff00 (d) #000000
28. 28.🌈 Which colour is rgb(255, 0, 0)? (a) cyan (b) yellow (c) bright green (d) red
29. 29.🌈 Which colour of light is strongest in rgb(93, 130, 165)? (a) red (b) blue (c) green
30. 30.🌈 Which hex code is blue? (a) #ff00ff (b) #000000 (c) #0000ff (d) #ffffff
31. 31.🌈 In #000e00 the green part is the hex number 0e. What is it as a normal number?
32. 32.🌈 In #b30000 the red part is the hex number b3. What is it as a normal number?
33. 33.🌈 In #340000 the red part is the hex number 34. What is it as a normal number?
34. 34.🌈 Which colour is #00ff00? (a) magenta (b) bright green (c) white (d) yellow
35. 35.🌈 In #d10000 the red part is the hex number d1. What is it as a normal number?
36. 36.🌈 Which colour is #00ffff? (a) white (b) cyan (c) red (d) black
37. 37.🌈 In #0000f4 the blue part is the hex number f4. What is it as a normal number?
38. 38.🌈 Which colour is rgb(0, 0, 0)? (a) white (b) red (c) black (d) yellow
39. 39.🌈 Which colour is rgb(255, 255, 255)? (a) black (b) white (c) magenta (d) red
40. 40.🌈 Which colour of light is strongest in rgb(249, 8, 134)? (a) blue (b) green (c) red

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