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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 284 · 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 easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) white on black
  2. 2.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) pale pink on white (d) dark blue on white
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Send button: 40 px tall
    Save button: 36 px tall
  4. 4.True or false: strong colour contrast is poor button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 36 px tall
    Back button: 40 px tall
  6. 6.True or false: grey text on grey is poor button design. (a) True (b) False
  7. 7.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) white on dark green (d) dark blue on white
  8. 8.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) red on green
  9. 9.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  11. 11.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) pale pink on white (d) dark blue on white
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) black on pale grey (d) red on green
  13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  15. 15.True or false: a big, easy tap area is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 56 px tall
    Help button: 48 px tall
    Save button: 36 px tall     (a) Help (b) Send (c) Save (d) Back
  17. 17.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Start button: 56 px tall
    Back button: 36 px tall
    Help button: 36 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Next button: 64 px tall
    Start button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Save button: 36 px tall
    Done button: 44 px tall
  26. 26.🌗 Is dark blue on black 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. Which button is too small?
    Cancel button: 60 px tall
    Start button: 48 px tall
    Next button: 48 px tall
    Done button: 24 px tall     (a) Done (b) Cancel (c) Next (d) Start
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 56 px tall
    Start button: 52 px tall
    Save button: 60 px tall     (a) Start (b) Save (c) Next (d) Done
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Help button: 64 px tall
    Done button: 52 px tall
    Cancel button: 44 px tall     (a) Cancel (b) Send (c) Done (d) Help
  30. 30.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) white on black
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Cancel button: 32 px tall
    Done button: 72 px tall
    Help button: 48 px tall     (a) Done (b) Cancel (c) Save (d) Help
  32. 32.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) yellow on white (d) red on green
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Cancel button: 40 px tall
    Done button: 36 px tall
  34. 34.True or false: icons with no meaning is good button design. (a) False (b) True
  35. 35.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 44 px tall
    Next button: 64 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Send button: 64 px tall
    Done button: 40 px tall
    Help button: 52 px tall     (a) Send (b) Save (c) Done (d) Help
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 40 px tall
    Back button: 64 px tall
    Cancel button: 64 px tall     (a) Back (b) Done (c) Save (d) Cancel

Answer key

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

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