App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 126 · 40 questions

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

1. 1.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) white on dark green (d) white on black
2. 2.True or false: icons with no meaning is good button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Back button: 36 px tall
   Send button: 64 px tall
   Cancel button: 56 px tall
4. 4.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) pale pink on white (d) dark blue on black
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Help button: 36 px tall
   Next button: 56 px tall
6. 6.True or false: buttons almost touching is good button design. (a) False (b) True
7. 7.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.True or false: strong colour contrast is poor button design. (a) True (b) False
9. 9.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) pale pink on white
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 72 px tall
    Help button: 36 px tall
    Cancel button: 48 px tall (a) Cancel (b) Back (c) Help (d) Next
12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) pale pink on white (d) red on green
14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
16. 16.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) dark blue on black (d) light grey on white
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Start button: 52 px tall
    Next button: 64 px tall
18. 18.True or false: a clear word like Save is good button design. (a) False (b) True
19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
21. 21.True or false: a big, easy tap area is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 32 px tall
    Send button: 32 px tall
    Help button: 64 px tall
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
25. 25.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) white on dark green (d) black on yellow
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 40 px tall
    Next button: 64 px tall
28. 28.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) red on green
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Cancel button: 40 px tall
    Done button: 52 px tall (a) Help (b) Cancel (c) Done
30. 30.True or false: grey text on grey is good button design. (a) False (b) True
31. 31.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) black on yellow
32. 32.True or false: space between buttons is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Help button: 40 px tall
    Done button: 52 px tall
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Start button: 52 px tall
    Help button: 28 px tall (a) Save (b) Start (c) Help (d) Cancel
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 40 px tall
    Done button: 48 px tall
    Cancel button: 60 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Done button: 72 px tall
    Help button: 56 px tall
    Back button: 48 px tall (a) Back (b) Send (c) Help (d) Done
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Save button: 48 px tall
    Start button: 40 px tall (a) Start (b) Back (c) Save

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