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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 623 · 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 hard to read? (a) dark blue on white (b) black on pale grey (c) white on black (d) pale pink on white
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  3. 3.True or false: grey text on grey is poor button design. (a) False (b) True
  4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 24 px tall
    Done button: 52 px tall     (a) Done (b) Cancel (c) Send
  7. 7.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  8. 8.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on yellow (d) black on pale grey
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Help button: 56 px tall
    Done button: 68 px tall
    Next button: 56 px tall     (a) Next (b) Back (c) Done (d) Help
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Back button: 60 px tall
    Help button: 48 px tall     (a) Back (b) Done (c) Help
  11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.True or false: a big, easy tap area is good button design. (a) True (b) False
  14. 14.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.True or false: space between buttons is poor button design. (a) False (b) True
  16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  19. 19.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Done button: 48 px tall
    Help button: 52 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 60 px tall
    Send button: 48 px tall
    Next button: 36 px tall
  23. 23.True or false: a clear word like Save is good button design. (a) True (b) False
  24. 24.🔘 Is this good or poor button design: buttons almost touching? (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?
    Send button: 44 px tall
    Next button: 48 px tall
    Start button: 36 px tall
    Done button: 40 px tall
  26. 26.True or false: icons with no meaning is poor button design. (a) False (b) True
  27. 27.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) black on yellow (d) dark blue on white
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 36 px tall
    Start button: 68 px tall
    Help button: 52 px tall     (a) Back (b) Save (c) Start (d) Help
  29. 29.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 40 px tall
    Cancel button: 48 px tall
  31. 31.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) light grey on white (d) yellow on white
  32. 32.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on black (d) red on green
  33. 33.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  34. 34.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Help button: 60 px tall
    Done button: 40 px tall     (a) Send (b) Help (c) Done
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Save button: 48 px tall
    Next button: 52 px tall
  37. 37.🌗 Is red on green 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 poor button design. (a) True (b) False
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 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?
    Cancel button: 52 px tall
    Save button: 40 px tall
    Back button: 36 px tall

Answer key

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

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