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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 403 · 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) white on black (c) black on yellow (d) pale pink on white
  2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Save button: 36 px tall
    Start button: 52 px tall
    Done button: 40 px tall
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on black (d) yellow on white
  5. 5.True or false: a big, easy tap area is poor button design. (a) True (b) False
  6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  8. 8.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) dark blue on black (d) black on pale grey
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Next button: 48 px tall
    Start button: 64 px tall     (a) Next (b) Start (c) Done
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 48 px tall
    Help button: 36 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Send button: 44 px tall
    Next button: 64 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 36 px tall
    Save button: 52 px tall
    Back button: 60 px tall
  14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 56 px tall
    Start button: 64 px tall
    Send button: 24 px tall     (a) Send (b) Cancel (c) Start (d) Back
  16. 16.True or false: strong colour contrast is good button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 52 px tall
    Help button: 40 px tall
    Save button: 52 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 60 px tall
    Start button: 36 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Send button: 56 px tall
    Help button: 36 px tall
    Save button: 56 px tall
  20. 20.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Back button: 52 px tall
    Done button: 32 px tall     (a) Done (b) Back (c) Send
  22. 22.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) dark blue on white
  23. 23.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) light grey on white (d) white on black
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (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?
    Back button: 40 px tall
    Cancel button: 40 px tall
    Send button: 64 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 64 px tall
    Start button: 64 px tall
    Cancel button: 36 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 64 px tall
    Send button: 56 px tall
    Help button: 64 px tall
  28. 28.Which colour pair is hard to read? (a) dark blue on white (b) dark blue on black (c) black on pale grey (d) white on dark green
  29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  30. 30.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) pale pink on white
  31. 31.True or false: icons with no meaning is good button design. (a) False (b) True
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Help button: 52 px tall
    Cancel button: 72 px tall     (a) Help (b) Back (c) Cancel
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  34. 34.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) light grey on white (d) red on green
  35. 35.True or false: space between buttons is poor button design. (a) True (b) False
  36. 36.True or false: icons with no meaning is poor button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 60 px tall
    Done button: 36 px tall
    Save button: 64 px tall     (a) Save (b) Start (c) Done (d) Back
  39. 39.True or false: a clear word like Save is poor button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Start button: 60 px tall
    Cancel button: 32 px tall

Answer key

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

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