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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 123 · 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) dark blue on white (b) black on yellow (c) pale pink on white (d) white on black
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 52 px tall
    Cancel button: 40 px tall
    Next button: 32 px tall
  3. 3.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.True or false: a big, easy tap area is good button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Send button: 68 px tall
    Done button: 60 px tall     (a) Done (b) Send (c) Save
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) red on green
  7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Start button: 24 px tall
    Send button: 48 px tall     (a) Start (b) Send (c) Back
  10. 10.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Start button: 64 px tall
    Send button: 56 px tall     (a) Start (b) Send (c) Save
  13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
  14. 14.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.True or false: strong colour contrast is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 56 px tall
    Help button: 64 px tall
    Next button: 64 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 52 px tall
    Start button: 64 px tall
    Help button: 40 px tall
  19. 19.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on black (d) pale pink on white
  20. 20.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) black on pale grey (d) black on yellow
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 40 px tall
    Start button: 56 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 24 px tall
    Cancel button: 56 px tall     (a) Help (b) Cancel (c) Send
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall
    Start button: 56 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Back button: 68 px tall
    Start button: 56 px tall     (a) Start (b) Back (c) Done
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Send button: 72 px tall
    Cancel button: 44 px tall     (a) Next (b) Send (c) Cancel
  26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Save button: 44 px tall
    Back button: 32 px tall
  28. 28.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Back button: 64 px tall
  30. 30.🌗 Is red on green 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?
    Help button: 56 px tall
    Save button: 64 px tall
    Next button: 24 px tall
    Back button: 52 px tall     (a) Help (b) Back (c) Next (d) Save
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 40 px tall
    Back button: 64 px tall
  33. 33.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) dark blue on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 44 px tall
    Start button: 32 px tall
    Back button: 44 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Start button: 52 px tall
    Back button: 52 px tall
    Help button: 44 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Send button: 72 px tall
    Next button: 64 px tall     (a) Done (b) Send (c) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Cancel button: 60 px tall
    Done button: 56 px tall     (a) Back (b) Done (c) Cancel
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Start button: 72 px tall
    Save button: 24 px tall
    Next button: 68 px tall     (a) Save (b) Next (c) Start (d) Back
  40. 40.True or false: buttons almost touching is good button design. (a) False (b) True

Answer key

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

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