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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 23 · 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 hard to read? (a) white on dark green (b) black on yellow (c) light grey on white (d) black on pale grey
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Back button: 44 px tall
    Done button: 56 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 36 px tall
    Send button: 36 px tall
    Done button: 36 px tall
  4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  5. 5.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) pale pink on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Help button: 48 px tall
    Back button: 32 px tall
    Start button: 56 px tall     (a) Back (b) Done (c) Start (d) Help
  8. 8.True or false: space between buttons is poor button design. (a) False (b) True
  9. 9.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) yellow on white (d) white on black
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🌗 Is white on dark green 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?
    Next button: 64 px tall
    Start button: 44 px tall
    Save button: 64 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  17. 17.True or false: grey text on grey is good button design. (a) False (b) True
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Cancel button: 52 px tall
    Send button: 32 px tall
  19. 19.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) yellow on white (d) pale pink on white
  20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) black on yellow (d) white on dark green
  22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  23. 23.🌗 Is dark blue on white 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?
    Help button: 56 px tall
    Done button: 64 px tall
    Back button: 36 px tall
  25. 25.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) pale pink on white (d) black on pale grey
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 52 px tall
    Cancel button: 52 px tall
    Send button: 52 px tall
  27. 27.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 44 px tall
    Cancel button: 44 px tall
    Start button: 60 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Done button: 40 px tall
    Next button: 40 px tall
  30. 30.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 56 px tall
    Next button: 44 px tall
    Save button: 36 px tall
  32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 44 px tall
    Save button: 68 px tall     (a) Save (b) Done (c) Back
  34. 34.True or false: a clear word like Save is good button design. (a) False (b) True
  35. 35.True or false: buttons almost touching is good button design. (a) True (b) False
  36. 36.Which colour pair is hard to read? (a) red on green (b) dark blue on white (c) white on black (d) white on dark green
  37. 37.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 48 px tall
    Cancel button: 68 px tall     (a) Cancel (b) Help (c) Next
  39. 39.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) pale pink on white (d) light grey on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 64 px tall
    Save button: 40 px tall
    Next button: 64 px tall

Answer key

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

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