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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 574 · 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: grey text on grey is poor button design. (a) True (b) False
  2. 2.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) red on green
  3. 3.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Start button: 48 px tall
    Back button: 68 px tall
    Next button: 68 px tall     (a) Back (b) Next (c) Help (d) Start
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on yellow (d) red on green
  7. 7.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on white (d) dark blue on black
  8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 36 px tall
    Help button: 32 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Send button: 28 px tall
    Cancel button: 56 px tall     (a) Save (b) Send (c) Cancel
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Cancel button: 40 px tall
    Next button: 40 px tall
  18. 18.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.True or false: buttons almost touching is poor button design. (a) True (b) False
  20. 20.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) dark blue on white (d) white on black
  21. 21.True or false: a clear word like Save is good button design. (a) False (b) True
  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?
    Back button: 72 px tall
    Save button: 32 px tall
    Cancel button: 68 px tall     (a) Save (b) Back (c) Cancel
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Next button: 44 px tall
    Send button: 40 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 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?
    Done button: 32 px tall
    Send button: 60 px tall
    Save button: 36 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Start button: 72 px tall
    Send button: 68 px tall
    Next button: 68 px tall     (a) Start (b) Cancel (c) Send (d) Next
  31. 31.🔘 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
    Cancel button: 48 px tall
    Send button: 48 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 64 px tall
    Send button: 68 px tall     (a) Send (b) Start (c) Save
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Back button: 64 px tall
    Next button: 36 px tall
  35. 35.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Save button: 56 px tall
    Help button: 32 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 60 px tall
    Save button: 44 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 28 px tall
    Start button: 64 px tall     (a) Start (b) Help (c) Save
  39. 39.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?

Answer key

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

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