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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 192 · 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?
    Save button: 44 px tall
    Send button: 64 px tall
    Cancel button: 48 px tall
  2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 32 px tall
    Help button: 32 px tall
  4. 4.True or false: strong colour contrast is good button design. (a) False (b) True
  5. 5.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
  6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  8. 8.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on yellow (d) light grey on white
  9. 9.🌗 Is white on black 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 Cancel button is 24 px tall. How many px taller must it be?
  11. 11.True or false: icons with no meaning is good button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 36 px tall
    Cancel button: 56 px tall     (a) Help (b) Cancel (c) Start
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Cancel button: 28 px tall
    Save button: 72 px tall     (a) Save (b) Next (c) Cancel
  14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Help button: 24 px tall
    Start button: 60 px tall     (a) Start (b) Help (c) Save
  16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Start button: 44 px tall
    Send button: 36 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Cancel button: 64 px tall
    Start button: 48 px tall
    Done button: 32 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 36 px tall
    Next button: 44 px tall
    Back button: 40 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Back button: 52 px tall
    Next button: 36 px tall
    Send button: 36 px tall
  27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
  30. 30.True or false: space between buttons is good button design. (a) False (b) True
  31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
  34. 34.True or false: a clear word like Save 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
    Done button: 36 px tall
    Cancel button: 48 px tall
    Help button: 52 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 32 px tall
    Next button: 36 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  38. 38.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) red on green
  39. 39.True or false: buttons almost touching is poor button design. (a) False (b) True
  40. 40.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design

Answer key

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

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