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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 422 · 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) pale pink on white (b) white on black (c) dark blue on white (d) black on yellow
  2. 2.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) white on dark green (d) black on yellow
  3. 3.True or false: a big, easy tap area is good button design. (a) False (b) True
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Start button: 68 px tall
    Next button: 32 px tall     (a) Send (b) Next (c) Start
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 56 px tall
    Save button: 44 px tall
    Help button: 56 px tall
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Done button: 72 px tall
    Next button: 48 px tall     (a) Next (b) Done (c) Help
  10. 10.True or false: grey text on grey is good button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  12. 12.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) yellow on white
  13. 13.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on pale grey (d) dark blue on black
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Next button: 68 px tall
    Help button: 28 px tall     (a) Send (b) Next (c) Help
  16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  17. 17.True or false: a clear word like Save is good 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?
    Next button: 32 px tall
    Send button: 44 px tall
    Save button: 64 px tall
  19. 19.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  20. 20.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) dark blue on black (d) red on green
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Start button: 40 px tall
    Save button: 40 px tall
    Next button: 48 px tall
  22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 28 px tall
    Done button: 52 px tall     (a) Next (b) Send (c) Done
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 40 px tall
    Back button: 52 px tall     (a) Cancel (b) Done (c) Back
  25. 25.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.🌗 Is dark blue on white 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 Save button is 28 px tall. How many px taller must it be?
  28. 28.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) red on green (d) pale pink on white
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 44 px tall
    Done button: 40 px tall
    Send button: 60 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 32 px tall
    Save button: 68 px tall
    Start button: 60 px tall     (a) Cancel (b) Save (c) Send (d) Start
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Next button: 60 px tall
    Send button: 48 px tall
    Start button: 52 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 32 px tall
    Done button: 56 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 48 px tall
    Send button: 64 px tall
  34. 34.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Save button: 40 px tall
    Done button: 64 px tall
    Cancel button: 60 px tall
  36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Help button: 48 px tall
    Send button: 40 px tall
    Next button: 32 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  39. 39.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on black (d) black on yellow
  40. 40.True or false: buttons almost touching is good button design. (a) False (b) True

Answer key

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

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