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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 120 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Save button: 60 px tall
    Done button: 44 px tall
    Back button: 32 px tall
  2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 52 px tall
    Done button: 72 px tall
    Back button: 64 px tall     (a) Back (b) Done (c) Save (d) Cancel
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  5. 5.True or false: grey text on grey is good button design. (a) False (b) True
  6. 6.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) pale pink on white (d) light grey on white
  7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
  8. 8.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) black on yellow
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  11. 11.True or false: grey text on grey is poor button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Cancel button: 60 px tall
    Save button: 52 px tall     (a) Send (b) Cancel (c) Save
  13. 13.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Start button: 68 px tall
    Send button: 56 px tall     (a) Send (b) Start (c) Back
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 48 px tall
    Save button: 36 px tall
    Send button: 60 px tall     (a) Save (b) Next (c) Cancel (d) Send
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Done button: 56 px tall
    Next button: 64 px tall
    Back button: 60 px tall     (a) Done (b) Start (c) Back (d) Next
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Back button: 56 px tall
    Start button: 56 px tall
    Send button: 60 px tall     (a) Save (b) Send (c) Start (d) Back
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 44 px tall
    Done button: 44 px tall
    Next button: 44 px tall
  20. 20.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) yellow on white
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 48 px tall
    Done button: 60 px tall     (a) Send (b) Back (c) Done
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Cancel button: 48 px tall
    Start button: 52 px tall     (a) Cancel (b) Back (c) Start
  23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 36 px tall
    Send button: 60 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Next button: 64 px tall
    Save button: 64 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Help button: 24 px tall
    Done button: 60 px tall
    Start button: 52 px tall     (a) Start (b) Cancel (c) Done (d) Help
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 48 px tall
    Save button: 56 px tall
  29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  31. 31.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) dark blue on white
  32. 32.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Save button: 48 px tall
    Back button: 64 px tall     (a) Save (b) Back (c) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Help button: 68 px tall
    Send button: 72 px tall     (a) Help (b) Send (c) Save
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 52 px tall
    Back button: 44 px tall
    Done button: 64 px tall     (a) Send (b) Done (c) Back (d) Next
  36. 36.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.True or false: a clear word like Save is good button design. (a) False (b) True
  39. 39.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
  40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design

Answer key

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

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