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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 401 · 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: strong colour contrast is poor button design. (a) False (b) True
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 52 px tall
    Help button: 52 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Help (c) Save (d) Start
  3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.True or false: space between buttons is good button design. (a) False (b) True
  6. 6.True or false: buttons almost touching is good button design. (a) True (b) False
  7. 7.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) red on green (d) light grey on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 44 px tall
    Done button: 36 px tall
    Next button: 40 px tall
  9. 9.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) light grey on white
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 52 px tall
    Save button: 48 px tall
    Done button: 32 px tall     (a) Send (b) Done (c) Back (d) Save
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 52 px tall
    Start button: 48 px tall
    Cancel button: 40 px tall     (a) Done (b) Cancel (c) Back (d) Start
  13. 13.True or false: strong colour contrast is good button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Done button: 52 px tall
    Back button: 52 px tall     (a) Save (b) Back (c) Done
  15. 15.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) white on dark green (d) light grey on white
  16. 16.True or false: buttons almost touching is poor button design. (a) False (b) True
  17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Cancel button: 52 px tall
    Start button: 52 px tall
    Save button: 48 px tall     (a) Next (b) Start (c) Cancel (d) Save
  21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  22. 22.True or false: grey text on grey is good button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 40 px tall
    Save button: 40 px tall
  24. 24.True or false: a big, easy tap area is good button design. (a) True (b) False
  25. 25.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 68 px tall
    Save button: 52 px tall
    Done button: 60 px tall     (a) Help (b) Done (c) Save (d) Start
  28. 28.True or false: a clear word like Save is poor button design. (a) False (b) True
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  33. 33.True or false: space between buttons is poor button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Save button: 44 px tall
    Cancel button: 36 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Save button: 36 px tall
    Cancel button: 72 px tall
    Back button: 72 px tall     (a) Done (b) Save (c) Cancel (d) Back
  37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 64 px tall
    Done button: 32 px tall
  39. 39.True or false: a clear word like Save is good button design. (a) True (b) False
  40. 40.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) white on black

Answer key

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

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