App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 568 · 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.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
2. 2.True or false: buttons almost touching is poor button design. (a) False (b) True
3. 3.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on yellow (d) pale pink on white
4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
5. 5.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) light grey on white (d) yellow on white
6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
7. 7.True or false: space between buttons is good button design. (a) False (b) True
8. 8.🔘 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
   Send button: 40 px tall
   Cancel button: 56 px tall
9. 9.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) dark blue on black
12. 12.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Cancel button: 60 px tall
    Back button: 52 px tall (a) Back (b) Cancel (c) Save
16. 16.True or false: icons with no meaning is poor button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.True or false: a clear word like Save is poor button design. (a) True (b) False
20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) red on green
22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 72 px tall
    Next button: 32 px tall
    Start button: 68 px tall (a) Back (b) Start (c) Next (d) Send
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 36 px tall
    Back button: 32 px tall
26. 26.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) black on pale grey (d) white on dark green
27. 27.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 60 px tall
    Cancel button: 64 px tall
    Save button: 36 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 36 px tall
    Next button: 60 px tall
    Done button: 36 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 36 px tall
    Start button: 56 px tall (a) Start (b) Done (c) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 36 px tall
    Done button: 60 px tall
    Back button: 52 px tall
32. 32.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) light grey on white (d) dark blue on black
33. 33.True or false: space between buttons is poor button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 48 px tall
    Help button: 36 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Done button: 72 px tall
    Next button: 72 px tall
    Cancel button: 40 px tall (a) Next (b) Help (c) Done (d) Cancel
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 28 px tall
    Save button: 56 px tall
    Back button: 72 px tall (a) Send (b) Next (c) Save (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 36 px tall
    Next button: 60 px tall (a) Cancel (b) Next (c) Save
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 40 px tall
    Send button: 68 px tall (a) Start (b) Send (c) Cancel

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