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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 256 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Help button: 44 px tall
    Send button: 48 px tall     (a) Help (b) Start (c) Send
  2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 32 px tall
    Done button: 48 px tall
    Save button: 48 px tall     (a) Send (b) Done (c) Start (d) Save
  4. 4.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 52 px tall
    Save button: 56 px tall
    Back button: 72 px tall     (a) Save (b) Send (c) Next (d) Back
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 56 px tall
    Next button: 72 px tall
    Start button: 32 px tall     (a) Send (b) Next (c) Start (d) Cancel
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 52 px tall
    Next button: 28 px tall
    Save button: 64 px tall     (a) Save (b) Start (c) Cancel (d) Next
  8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
  9. 9.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
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Send button: 36 px tall
    Help button: 44 px tall
  12. 12.🌗 Is white on dark green 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. Which button is too small?
    Save button: 72 px tall
    Back button: 28 px tall
    Start button: 64 px tall     (a) Save (b) Start (c) Back
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Save button: 72 px tall
    Help button: 48 px tall
    Send button: 72 px tall     (a) Send (b) Help (c) Cancel (d) Save
  15. 15.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) black on yellow
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 32 px tall
    Done button: 40 px tall
  17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 36 px tall
    Next button: 52 px tall
  21. 21.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) white on dark green (d) black on yellow
  22. 22.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on dark green (d) white on black
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 60 px tall
    Back button: 44 px tall
    Next button: 52 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  28. 28.True or false: space between buttons is poor button design. (a) True (b) False
  29. 29.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) red on green (d) black on pale grey
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 52 px tall
    Send button: 56 px tall
    Save button: 28 px tall     (a) Send (b) Start (c) Save (d) Cancel
  31. 31.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  32. 32.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  35. 35.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  36. 36.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) red on green (d) pale pink on white
  37. 37.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Back button: 72 px tall
    Done button: 68 px tall
    Save button: 48 px tall     (a) Help (b) Back (c) Done (d) Save
  39. 39.True or false: icons with no meaning is good button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 36 px tall
    Start button: 52 px tall
    Next button: 64 px tall     (a) Next (b) Cancel (c) Start (d) Back

Answer key

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

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