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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 576 · 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 easy to read? (a) dark blue on black (b) white on dark green (c) light grey on white (d) yellow on white
  2. 2.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) pale pink on white (d) yellow on white
  3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 32 px tall
    Done button: 60 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Next button: 32 px tall
    Start button: 44 px tall
    Send button: 56 px tall
  7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Done button: 44 px tall
    Send button: 56 px tall
    Back button: 60 px tall
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 40 px tall
    Done button: 64 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 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?
    Send button: 72 px tall
    Cancel button: 44 px tall
    Start button: 52 px tall     (a) Start (b) Cancel (c) Send
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 52 px tall
    Save button: 28 px tall     (a) Save (b) Help (c) Start
  15. 15.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) red on green (d) white on dark green
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 32 px tall
    Send button: 32 px tall
    Back button: 64 px tall
  17. 17.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 68 px tall
    Send button: 32 px tall
    Next button: 60 px tall     (a) Send (b) Next (c) Start (d) Save
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Back button: 56 px tall
    Cancel button: 28 px tall
    Start button: 64 px tall     (a) Back (b) Cancel (c) Send (d) Start
  20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 44 px tall
    Send button: 48 px tall     (a) Send (b) Back (c) Next
  23. 23.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  26. 26.🌗 Is dark blue on white 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. How many of these buttons follow the rule?
    Back button: 60 px tall
    Cancel button: 32 px tall
    Next button: 60 px tall
  28. 28.True or false: icons with no meaning is poor button design. (a) False (b) True
  29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
  30. 30.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) pale pink on white (d) white on black
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Save button: 52 px tall
    Send button: 36 px tall     (a) Save (b) Send (c) Done
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 48 px tall
    Back button: 24 px tall
    Cancel button: 68 px tall     (a) Help (b) Send (c) Back (d) Cancel
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Save button: 56 px tall
    Cancel button: 44 px tall     (a) Help (b) Save (c) Cancel
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 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?
    Send button: 24 px tall
    Help button: 60 px tall
    Next button: 52 px tall     (a) Help (b) Next (c) Send
  36. 36.True or false: grey text on grey is poor button design. (a) False (b) True
  37. 37.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) dark blue on black (d) red on green
  38. 38.True or false: a clear word like Save is good button design. (a) True (b) False
  39. 39.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) red on green
  40. 40.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design

Answer key

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

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