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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 606 · 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.True or false: grey text on grey is good button design. (a) False (b) True
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 60 px tall
    Back button: 32 px tall
    Start button: 64 px tall     (a) Start (b) Help (c) Save (d) Back
  3. 3.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) red on green
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  7. 7.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) white on dark green (d) yellow on white
  8. 8.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.True or false: a clear word like Save is poor button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Start button: 60 px tall
    Help button: 36 px tall     (a) Next (b) Help (c) Start
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Send button: 48 px tall
    Back button: 56 px tall
    Next button: 40 px tall     (a) Back (b) Start (c) Next (d) Send
  14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Done button: 36 px tall
    Save button: 44 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  17. 17.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) pale pink on white (d) dark blue on black
  18. 18.True or false: space between buttons is poor button design. (a) True (b) False
  19. 19.Which colour pair is hard to read? (a) red on green (b) white on black (c) black on yellow (d) white on dark green
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 56 px tall
    Save button: 68 px tall
    Back button: 52 px tall     (a) Done (b) Next (c) Save (d) Back
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 68 px tall
    Done button: 36 px tall
    Send button: 48 px tall     (a) Done (b) Start (c) Back (d) Send
  22. 22.True or false: a big, easy tap area is poor button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 52 px tall
    Cancel button: 52 px tall
    Save button: 40 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 36 px tall
    Done button: 68 px tall
    Next button: 60 px tall     (a) Back (b) Help (c) Done (d) Next
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 60 px tall
    Help button: 48 px tall
    Start button: 28 px tall     (a) Start (b) Send (c) Next (d) Help
  26. 26.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) yellow on white (d) dark blue on white
  27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 56 px tall
    Save button: 64 px tall
    Back button: 40 px tall     (a) Save (b) Start (c) Done (d) Back
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  32. 32.True or false: grey text on grey is poor button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Send button: 68 px tall
    Back button: 60 px tall
    Start button: 28 px tall     (a) Back (b) Start (c) Send (d) Save
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Help button: 56 px tall
    Start button: 44 px tall     (a) Send (b) Help (c) Start
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Back button: 60 px tall
    Cancel button: 44 px tall
    Save button: 32 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 32 px tall
    Send button: 44 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 44 px tall
    Help button: 48 px tall
    Back button: 32 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 56 px tall
    Cancel button: 60 px tall

Answer key

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

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