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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 86 · 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: buttons almost touching? (a) poor design (b) good design
  2. 2.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
  3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
  4. 4.🌗 Is yellow on white 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: 48 px tall
    Back button: 68 px tall
    Help button: 24 px tall     (a) Back (b) Cancel (c) Help
  6. 6.True or false: buttons almost touching is good button design. (a) False (b) True
  7. 7.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Back button: 40 px tall
    Save button: 32 px tall
  11. 11.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 36 px tall
    Send button: 40 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  17. 17.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) pale pink on white (d) white on black
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  19. 19.True or false: buttons almost touching is poor button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Save button: 52 px tall
    Send button: 56 px tall     (a) Save (b) Send (c) Back
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 32 px tall
    Done button: 60 px tall
    Next button: 48 px tall
  22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.True or false: icons with no meaning is poor button design. (a) True (b) False
  24. 24.True or false: strong colour contrast is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Next button: 48 px tall
    Cancel button: 32 px tall
    Save button: 72 px tall     (a) Next (b) Save (c) Back (d) Cancel
  27. 27.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
  28. 28.True or false: space between buttons is good button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Save button: 56 px tall
    Back button: 52 px tall
    Cancel button: 52 px tall
  30. 30.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  31. 31.True or false: grey text on grey is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 44 px tall
    Send button: 56 px tall
    Save button: 36 px tall
  33. 33.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) dark blue on white
  34. 34.True or false: a clear word like Save is poor button design. (a) True (b) False
  35. 35.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) pale pink on white (d) red on green
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Start button: 44 px tall
    Help button: 56 px tall     (a) Cancel (b) Start (c) Help
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 40 px tall
    Save button: 60 px tall
  39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Next button: 64 px tall
    Done button: 48 px tall     (a) Done (b) Back (c) Next

Answer key

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

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