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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 55 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Save button: 32 px tall
    Help button: 52 px tall     (a) Back (b) Help (c) Save
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Next button: 48 px tall
    Save button: 52 px tall
    Back button: 48 px tall     (a) Cancel (b) Back (c) Save (d) Next
  4. 4.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) pale pink on white (d) white on black
  5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  6. 6.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) black on pale grey (d) white on dark green
  7. 7.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) white on dark green (d) red on green
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  10. 10.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.True or false: space between buttons is poor button design. (a) True (b) False
  12. 12.True or false: a big, easy tap area is poor button design. (a) False (b) True
  13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) yellow on white
  15. 15.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on white (d) light grey on white
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 44 px tall
    Start button: 72 px tall     (a) Help (b) Start (c) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 32 px tall
    Help button: 48 px tall     (a) Help (b) Next (c) Cancel
  18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.True or false: strong colour contrast is good button design. (a) True (b) False
  20. 20.True or false: space between buttons is good button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 36 px tall
    Next button: 60 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 32 px tall
    Cancel button: 32 px tall
  24. 24.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 60 px tall
    Done button: 60 px tall
  26. 26.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on dark green (d) pale pink on white
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Next button: 72 px tall
    Send button: 64 px tall     (a) Send (b) Cancel (c) Next
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 56 px tall
    Help button: 56 px tall
    Done button: 40 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  30. 30.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 56 px tall
    Save button: 48 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Start button: 60 px tall
    Done button: 44 px tall
    Send button: 56 px tall     (a) Start (b) Back (c) Send (d) Done
  33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 28 px tall
    Send button: 52 px tall     (a) Next (b) Send (c) Done
  37. 37.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 64 px tall
    Help button: 32 px tall
    Save button: 64 px tall

Answer key

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

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