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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 677 · 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.True or false: a clear word like Save is good button design. (a) True (b) False
  2. 2.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) dark blue on white (d) white on dark green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) black on pale grey (d) light grey on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 64 px tall
    Back button: 40 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 64 px tall
    Save button: 24 px tall     (a) Save (b) Cancel (c) Start
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  10. 10.True or false: a big, easy tap area is good button design. (a) True (b) False
  11. 11.True or false: space between buttons is poor button design. (a) False (b) True
  12. 12.True or false: buttons almost touching is good button design. (a) True (b) False
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  14. 14.True or false: a big, easy tap area is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Cancel button: 64 px tall
    Done button: 36 px tall
  16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Send button: 40 px tall
    Save button: 64 px tall
  19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  20. 20.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on black (d) white on dark green
  21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  22. 22.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Start button: 60 px tall
    Send button: 56 px tall
    Next button: 64 px tall     (a) Start (b) Help (c) Next (d) Send
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  25. 25.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) black on yellow (d) yellow on white
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Help button: 44 px tall
    Next button: 40 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 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?
    Back button: 32 px tall
    Next button: 44 px tall
    Done button: 56 px tall
    Start button: 56 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 52 px tall
    Back button: 48 px tall
    Save button: 48 px tall
  30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  35. 35.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) dark blue on white
  37. 37.True or false: space between buttons is good button design. (a) True (b) False
  38. 38.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) yellow on white (d) white on black
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Done button: 52 px tall
    Next button: 32 px tall
    Save button: 36 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 52 px tall
    Send button: 64 px tall
    Save button: 52 px tall

Answer key

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

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