App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 424 · 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 easy to read? (a) yellow on white (b) white on dark green (c) dark blue on black (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Send button: 60 px tall
   Help button: 36 px tall (a) Help (b) Next (c) Send
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 60 px tall
   Back button: 28 px tall
   Cancel button: 48 px tall (a) Back (b) Start (c) Cancel
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
7. 7.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) pale pink on white
9. 9.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) dark blue on black (d) black on pale grey
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
11. 11.True or false: space between buttons is poor button design. (a) True (b) False
12. 12.True or false: a tiny 20 px button is good button design. (a) True (b) False
13. 13.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 60 px tall
    Help button: 44 px tall (a) Send (b) Help (c) Start
16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
17. 17.True or false: a big, easy tap area is good button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Next button: 60 px tall
    Cancel button: 72 px tall
    Send button: 68 px tall (a) Send (b) Next (c) Cancel (d) Save
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) dark blue on black (d) light grey on white
21. 21.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
22. 22.True or false: buttons almost touching is poor button design. (a) False (b) True
23. 23.True or false: a clear word like Save is good button design. (a) False (b) True
24. 24.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
27. 27.🔘 Is this good or poor button design: icons with no meaning? (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?
    Help button: 56 px tall
    Next button: 36 px tall
    Send button: 32 px tall
    Back button: 32 px tall
29. 29.True or false: a tiny 20 px button is poor button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Send button: 48 px tall
    Save button: 56 px tall (a) Save (b) Next (c) Send
31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.True or false: grey text on grey is good button design. (a) True (b) False
33. 33.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 44 px tall
    Send button: 32 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Help button: 52 px tall
    Done button: 40 px tall
    Start button: 32 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 40 px tall
    Help button: 48 px tall (a) Help (b) Back (c) Save
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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?
    Done button: 40 px tall
    Help button: 52 px tall
    Save button: 56 px tall
    Start button: 72 px tall (a) Start (b) Save (c) Done (d) Help
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall (a) Cancel (b) Send (c) Done

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