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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 265 · 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.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) red on green (d) light grey on white
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Send button: 44 px tall
    Help button: 64 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 48 px tall
    Help button: 40 px tall
  6. 6.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) yellow on white (d) white on black
  7. 7.True or false: strong colour contrast is poor button design. (a) False (b) True
  8. 8.True or false: buttons almost touching is good button design. (a) True (b) False
  9. 9.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.True or false: grey text on grey is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 24 px tall
    Next button: 64 px tall     (a) Next (b) Cancel (c) Done
  12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 44 px tall
    Done button: 48 px tall
  16. 16.True or false: space between buttons is good button design. (a) True (b) False
  17. 17.True or false: a clear word like Save 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?
    Save button: 32 px tall
    Done button: 36 px tall
    Cancel button: 52 px tall
  19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Done button: 56 px tall
    Next button: 56 px tall     (a) Start (b) Next (c) Done
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 48 px tall
    Start button: 28 px tall
    Send button: 64 px tall     (a) Send (b) Start (c) Cancel (d) Help
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) white on black (d) dark blue on white
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Back button: 64 px tall
    Save button: 44 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 68 px tall
    Send button: 44 px tall
    Start button: 56 px tall     (a) Start (b) Cancel (c) Send (d) Save
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Cancel button: 48 px tall
    Next button: 44 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Next button: 56 px tall
    Help button: 24 px tall     (a) Next (b) Help (c) Save
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  32. 32.True or false: space between buttons is poor button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Done button: 48 px tall
    Cancel button: 68 px tall     (a) Done (b) Cancel (c) Next
  35. 35.True or false: a tiny 20 px button is good button design. (a) True (b) False
  36. 36.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) red on green (d) white on dark green
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Done button: 44 px tall
    Back button: 56 px tall     (a) Send (b) Done (c) Back
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall     (a) Cancel (b) Done (c) Back

Answer key

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

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