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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 257 · 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) dark blue on white (b) light grey on white (c) pale pink on white (d) dark blue on black
  2. 2.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  4. 4.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  5. 5.True or false: a big, easy tap area is good button design. (a) False (b) True
  6. 6.True or false: space between buttons is good button design. (a) True (b) False
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 40 px tall
    Start button: 64 px tall
  9. 9.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) white on black
  10. 10.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) white on dark green
  11. 11.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) dark blue on black (d) yellow on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 48 px tall
    Send button: 60 px tall
    Done button: 48 px tall
  13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  14. 14.True or false: strong colour contrast is good button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Help button: 40 px tall
    Send button: 48 px tall
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Start button: 56 px tall
    Back button: 48 px tall
    Save button: 40 px tall     (a) Done (b) Start (c) Back (d) Save
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Cancel button: 36 px tall
    Back button: 44 px tall
    Next button: 56 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Done button: 32 px tall
    Start button: 48 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Help button: 56 px tall
    Send button: 40 px tall
    Cancel button: 64 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Cancel button: 52 px tall
    Send button: 36 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 52 px tall
    Send button: 56 px tall
    Next button: 44 px tall
  25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  26. 26.True or false: icons with no meaning is good button design. (a) False (b) True
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  28. 28.True or false: grey text on grey is poor button design. (a) True (b) False
  29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 68 px tall
    Save button: 24 px tall
    Start button: 52 px tall     (a) Back (b) Start (c) Next (d) Save
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 60 px tall
    Back button: 28 px tall     (a) Start (b) Back (c) Next
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Save button: 36 px tall
    Done button: 60 px tall
    Back button: 56 px tall     (a) Save (b) Back (c) Send (d) Done
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Back button: 44 px tall
    Save button: 36 px tall
    Help button: 60 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 48 px tall
    Done button: 52 px tall
    Help button: 56 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 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?
    Send button: 32 px tall
    Start button: 52 px tall
    Next button: 68 px tall     (a) Next (b) Send (c) Start
  38. 38.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) white on dark green (d) dark blue on black
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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