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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 426 · 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) white on dark green (b) yellow on white (c) black on pale grey (d) black on yellow
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 32 px tall
    Start button: 52 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  5. 5.🌗 Is pale pink on white 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) white on dark green (b) yellow on white (c) red on green (d) light grey on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Help button: 36 px tall
    Send button: 68 px tall     (a) Send (b) Help (c) Start
  8. 8.True or false: a clear word like Save is poor button design. (a) False (b) True
  9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 60 px tall
    Back button: 60 px tall
    Next button: 60 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 40 px tall
    Start button: 44 px tall
  13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  14. 14.True or false: space between buttons is good button design. (a) False (b) True
  15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.True or false: grey text on grey is good button design. (a) True (b) False
  17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  18. 18.True or false: icons with no meaning is poor button design. (a) False (b) True
  19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  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.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 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?
    Save button: 52 px tall
    Next button: 44 px tall
    Back button: 32 px tall
  29. 29.True or false: a clear word like Save is good button design. (a) True (b) False
  30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) red on green (d) yellow on white
  32. 32.True or false: buttons almost touching is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 56 px tall
    Next button: 40 px tall
  34. 34.True or false: a big, easy tap area is poor button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Cancel button: 60 px tall
    Start button: 32 px tall
    Next button: 56 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Next button: 44 px tall
    Back button: 52 px tall     (a) Next (b) Done (c) Back
  37. 37.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) dark blue on black
  38. 38.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) white on black
  39. 39.True or false: a big, easy tap area is good button design. (a) False (b) True
  40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

Answer key

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

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