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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 85 · 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 this good or poor button design: icons with no meaning? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 44 px tall
    Cancel button: 40 px tall
    Save button: 64 px tall
  3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 64 px tall
    Back button: 68 px tall     (a) Send (b) Cancel (c) Back
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  7. 7.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) yellow on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Help button: 48 px tall
    Save button: 52 px tall
    Send button: 32 px tall     (a) Help (b) Save (c) Cancel (d) Send
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Next button: 56 px tall
    Cancel button: 36 px tall
    Done button: 36 px tall
  10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
  11. 11.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on pale grey (d) dark blue on white
  12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  13. 13.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Next button: 40 px tall
    Save button: 56 px tall     (a) Send (b) Save (c) Next
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Cancel button: 52 px tall
    Save button: 48 px tall     (a) Save (b) Cancel (c) Back
  16. 16.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) dark blue on white (d) yellow on white
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Help button: 36 px tall
    Back button: 72 px tall     (a) Save (b) Help (c) Back
  18. 18.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) dark blue on white (d) white on black
  19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  21. 21.True or false: grey text on grey is poor button design. (a) True (b) False
  22. 22.🔘 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
    Back button: 52 px tall
    Done button: 44 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 60 px tall
    Cancel button: 28 px tall     (a) Send (b) Cancel (c) Back
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Next button: 32 px tall
    Cancel button: 36 px tall
    Send button: 44 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  26. 26.True or false: a big, easy tap area is poor button design. (a) True (b) False
  27. 27.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) black on yellow (d) red on green
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Help button: 40 px tall
    Done button: 44 px tall
  29. 29.True or false: grey text on grey is good button design. (a) False (b) True
  30. 30.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) black on pale grey (d) yellow on white
  31. 31.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) light grey on white
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 40 px tall
    Send button: 64 px tall
    Back button: 52 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Save button: 60 px tall
    Help button: 48 px tall
    Back button: 52 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 40 px tall
    Start button: 32 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Done button: 36 px tall
    Send button: 36 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Cancel button: 64 px tall
    Done button: 28 px tall     (a) Save (b) Cancel (c) Done
  38. 38.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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