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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 160 · 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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) yellow on white (d) white on dark green
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 56 px tall
    Next button: 44 px tall
    Send button: 52 px tall
  4. 4.True or false: strong colour contrast is poor button design. (a) True (b) False
  5. 5.True or false: a big, easy tap area is good button design. (a) False (b) True
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Start button: 52 px tall
    Next button: 40 px tall
    Save button: 64 px tall     (a) Next (b) Back (c) Start (d) Save
  9. 9.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on pale grey (d) black on yellow
  10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  11. 11.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) yellow on white (d) light grey on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 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?
    Back button: 52 px tall
    Help button: 28 px tall
    Done button: 48 px tall     (a) Help (b) Done (c) Back
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 44 px tall
    Back button: 60 px tall
    Start button: 40 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Next button: 56 px tall
    Save button: 56 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Back button: 52 px tall
    Save button: 64 px tall     (a) Save (b) Send (c) Back
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 44 px tall
    Done button: 56 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Done button: 64 px tall
    Cancel button: 72 px tall     (a) Done (b) Back (c) Cancel
  19. 19.True or false: buttons almost touching is good button design. (a) False (b) True
  20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.True or false: a tiny 20 px button 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: 40 px tall
    Save button: 60 px tall
    Cancel button: 48 px tall
    Start button: 32 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 64 px tall
    Cancel button: 44 px tall     (a) Save (b) Cancel (c) Start
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  26. 26.True or false: space between buttons is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 56 px tall
    Help button: 64 px tall
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 64 px tall
    Back button: 32 px tall
    Start button: 68 px tall     (a) Start (b) Cancel (c) Save (d) Back
  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 Back button is 36 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Start button: 52 px tall
    Help button: 48 px tall
  35. 35.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Send button: 68 px tall
    Help button: 52 px tall     (a) Help (b) Cancel (c) Send
  37. 37.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on black (d) black on yellow
  38. 38.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  39. 39.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) pale pink on white (d) white on black
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Help button: 60 px tall
    Cancel button: 52 px tall
    Save button: 60 px tall

Answer key

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

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