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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 113 · 40 questions
TalentJR

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.

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

Answer key

  1. dark blue on white
  2. good design
  3. 1
  4. Done
  5. True
  6. Done
  7. Done
  8. easy to read
  9. white on dark green
  10. black on pale grey
  11. poor design
  12. False
  13. 1
  14. hard to read
  15. poor design
  16. False
  17. 1
  18. hard to read
  19. 28
  20. easy to read
  21. poor design
  22. 8
  23. 28
  24. 4
  25. 4
  26. 0
  27. Back
  28. False
  29. 1
  30. easy to read
  31. 24
  32. light grey on white
  33. easy to read
  34. good design
  35. True
  36. 2
  37. 1
  38. 20
  39. 2
  40. Start

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