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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 266 · 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) light grey on white (b) dark blue on black (c) yellow on white (d) dark blue on white
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  4. 4.True or false: icons with no meaning is good button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Send button: 52 px tall
    Done button: 32 px tall
    Save button: 56 px tall
  6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 40 px tall
    Next button: 36 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) dark blue on white (d) black on pale grey
  10. 10.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) white on dark green (d) pale pink on white
  11. 11.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) light grey on white (d) black on pale grey
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 48 px tall
    Cancel button: 60 px tall
    Back button: 60 px tall     (a) Back (b) Next (c) Send (d) Cancel
  13. 13.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 36 px tall
    Cancel button: 52 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Cancel button: 36 px tall
    Start button: 64 px tall     (a) Cancel (b) Start (c) Done
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 60 px tall
    Cancel button: 60 px tall
  17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  19. 19.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.True or false: space between buttons is good button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 72 px tall
    Save button: 64 px tall
    Cancel button: 40 px tall     (a) Save (b) Back (c) Cancel (d) Send
  22. 22.True or false: space between buttons is poor button design. (a) False (b) True
  23. 23.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 56 px tall
    Back button: 60 px tall
  25. 25.True or false: a clear word like Save is good button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 44 px tall
    Save button: 48 px tall
  27. 27.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Help button: 48 px tall
    Back button: 72 px tall
    Done button: 68 px tall     (a) Back (b) Done (c) Start (d) Help
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 40 px tall
    Done button: 64 px tall
    Send button: 68 px tall     (a) Send (b) Help (c) Done (d) Next
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Done button: 52 px tall
    Back button: 60 px tall
    Send button: 64 px tall
  32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
  33. 33.True or false: strong colour contrast is good button design. (a) False (b) True
  34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  35. 35.True or false: strong colour contrast is poor button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Back button: 44 px tall
    Send button: 52 px tall
    Help button: 60 px tall     (a) Send (b) Help (c) Back (d) Start
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 28 px tall
    Start button: 64 px tall     (a) Done (b) Start (c) Help
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Send button: 68 px tall
    Next button: 28 px tall
    Done button: 52 px tall     (a) Send (b) Cancel (c) Next (d) Done
  39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 40 px tall
    Start button: 52 px tall     (a) Next (b) Save (c) Start

Answer key

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

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