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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 407 · 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) yellow on white (b) pale pink on white (c) light grey on white (d) dark blue on white
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  4. 4.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on black (d) black on pale grey
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  7. 7.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) yellow on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
  9. 9.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on dark green (d) yellow on white
  10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  11. 11.True or false: space between buttons is good button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Back button: 72 px tall
    Start button: 28 px tall
    Next button: 60 px tall     (a) Done (b) Back (c) Next (d) Start
  13. 13.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on black (d) black on yellow
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 72 px tall
    Help button: 60 px tall     (a) Start (b) Help (c) Save
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Cancel button: 68 px tall
    Send button: 44 px tall     (a) Done (b) Cancel (c) Send
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Help button: 60 px tall
    Cancel button: 24 px tall     (a) Next (b) Help (c) Cancel
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Back button: 36 px tall
    Send button: 40 px tall
    Cancel button: 44 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  19. 19.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.True or false: icons with no meaning is good button design. (a) True (b) False
  21. 21.True or false: buttons almost touching is good button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Cancel button: 32 px tall
    Done button: 64 px tall
    Start button: 32 px tall
  25. 25.True or false: a big, easy tap area is poor button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Start button: 72 px tall
    Send button: 56 px tall
    Next button: 56 px tall     (a) Start (b) Next (c) Send (d) Help
  27. 27.True or false: strong colour contrast is good button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Send button: 40 px tall
    Back button: 40 px tall
    Save button: 32 px tall
  31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Help button: 48 px tall
    Start button: 40 px tall     (a) Back (b) Help (c) Start
  34. 34.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) pale pink on white (d) dark blue on black
  35. 35.True or false: icons with no meaning is poor button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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?
    Start button: 44 px tall
    Done button: 48 px tall
    Back button: 52 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 48 px tall
    Cancel button: 64 px tall
  39. 39.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  40. 40.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design

Answer key

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

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