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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 605 · 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 yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) light grey on white (d) white on dark green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  5. 5.True or false: grey text on grey is good button design. (a) False (b) True
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  7. 7.True or false: strong colour contrast is good button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 52 px tall
    Next button: 52 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Save (c) Done
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Send button: 60 px tall
    Done button: 40 px tall     (a) Cancel (b) Send (c) Done
  14. 14.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) pale pink on white
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 72 px tall
    Help button: 24 px tall
    Start button: 56 px tall     (a) Start (b) Help (c) Send (d) Next
  17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 64 px tall
    Send button: 48 px tall
    Save button: 28 px tall     (a) Send (b) Back (c) Start (d) Save
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Next button: 64 px tall
    Back button: 40 px tall     (a) Start (b) Next (c) Back
  20. 20.True or false: a tiny 20 px button is good button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  22. 22.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) white on dark green (d) dark blue on white
  23. 23.🔘 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
    Send button: 32 px tall
    Done button: 60 px tall
  24. 24.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  25. 25.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) dark blue on black (d) white on dark green
  26. 26.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) light grey on white (d) white on dark green
  27. 27.True or false: icons with no meaning is good button design. (a) False (b) True
  28. 28.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 68 px tall
    Help button: 56 px tall
    Save button: 32 px tall     (a) Save (b) Cancel (c) Help (d) Next
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 72 px tall
    Done button: 44 px tall     (a) Start (b) Done (c) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Start button: 64 px tall
    Back button: 40 px tall     (a) Help (b) Back (c) Start
  34. 34.True or false: a big, easy tap area is poor button design. (a) True (b) False
  35. 35.True or false: a clear word like Save is poor button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Back button: 36 px tall
    Save button: 52 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Start button: 56 px tall
    Next button: 72 px tall     (a) Next (b) Start (c) Back
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Next button: 60 px tall
    Send button: 40 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Cancel button: 32 px tall
    Help button: 64 px tall
    Save button: 64 px tall     (a) Start (b) Cancel (c) Save (d) Help
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Start button: 40 px tall
    Cancel button: 64 px tall
    Send button: 60 px tall     (a) Save (b) Send (c) Start (d) Cancel

Answer key

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

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