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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 435 · 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) black on pale grey (b) white on dark green (c) red on green (d) black on yellow
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 32 px tall
    Save button: 60 px tall     (a) Save (b) Next (c) Send
  3. 3.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  5. 5.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) pale pink on white (d) dark blue on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 36 px tall
    Back button: 40 px tall
  7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.True or false: a big, easy tap area is poor button design. (a) True (b) False
  11. 11.True or false: a big, easy tap area is good button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on dark green (d) yellow on white
  15. 15.True or false: space between buttons is good button design. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.True or false: buttons almost touching is poor button design. (a) True (b) False
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 40 px tall
    Send button: 36 px tall
    Start button: 44 px tall
  20. 20.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on pale grey (d) pale pink on white
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Done button: 60 px tall
    Send button: 56 px tall
    Save button: 60 px tall
  22. 22.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Save button: 68 px tall
    Done button: 52 px tall
    Help button: 56 px tall     (a) Help (b) Next (c) Save (d) Done
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 44 px tall
    Done button: 64 px tall
    Help button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 28 px tall
    Save button: 48 px tall
    Cancel button: 60 px tall     (a) Save (b) Send (c) Start (d) Cancel
  26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.True or false: a tiny 20 px button is good button design. (a) False (b) True
  28. 28.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  29. 29.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Start button: 56 px tall
    Send button: 60 px tall
    Next button: 60 px tall     (a) Send (b) Done (c) Next (d) Start
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 52 px tall
    Start button: 56 px tall     (a) Help (b) Cancel (c) Start
  36. 36.True or false: grey text on grey is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 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?
    Start button: 44 px tall
    Help button: 44 px tall
    Done button: 44 px tall
    Back button: 60 px tall
  40. 40.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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