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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 218 · 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.True or false: grey text on grey is good button design. (a) False (b) True
  2. 2.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) light grey on white
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Done button: 36 px tall
    Back button: 56 px tall
  4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Done button: 56 px tall
    Start button: 52 px tall
    Back button: 24 px tall     (a) Start (b) Next (c) Back (d) Done
  7. 7.Which colour pair is hard to read? (a) white on black (b) red on green (c) dark blue on white (d) black on yellow
  8. 8.True or false: a clear word like Save is poor button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 72 px tall
    Back button: 24 px tall     (a) Cancel (b) Back (c) Next
  10. 10.True or false: space between buttons is good button design. (a) True (b) False
  11. 11.🌗 Is black on yellow 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.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Send button: 44 px tall
    Done button: 48 px tall
    Save button: 32 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 32 px tall
    Save button: 56 px tall
  17. 17.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) black on yellow (d) white on dark green
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 44 px tall
    Back button: 52 px tall
    Start button: 60 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Next button: 56 px tall
    Save button: 40 px tall
  20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) pale pink on white (d) red on green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Help button: 72 px tall
    Done button: 32 px tall
    Start button: 64 px tall     (a) Next (b) Start (c) Help (d) Done
  23. 23.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  25. 25.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  26. 26.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 56 px tall
    Send button: 24 px tall
    Cancel button: 56 px tall     (a) Help (b) Save (c) Send (d) Cancel
  28. 28.True or false: a big, easy tap area is poor button design. (a) True (b) False
  29. 29.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) yellow on white (d) black on yellow
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 48 px tall
    Help button: 60 px tall
  31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 40 px tall
    Start button: 56 px tall     (a) Help (b) Next (c) Start
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Send button: 52 px tall
    Cancel button: 68 px tall     (a) Send (b) Cancel (c) Next
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Send button: 68 px tall
    Done button: 36 px tall
    Cancel button: 52 px tall     (a) Done (b) Cancel (c) Start (d) Send
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 48 px tall
    Send button: 44 px tall     (a) Send (b) Back (c) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Cancel button: 48 px tall
    Save button: 64 px tall
  38. 38.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) dark blue on black (d) pale pink on white
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Back button: 56 px tall
    Start button: 36 px tall
    Cancel button: 32 px tall
  40. 40.True or false: a tiny 20 px button is good button design. (a) True (b) False

Answer key

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

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