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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 363 · 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.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  2. 2.True or false: a big, easy tap area is good button design. (a) True (b) False
  3. 3.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) light grey on white (d) dark blue on white
  4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  7. 7.True or false: grey text on grey is poor button design. (a) False (b) True
  8. 8.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Help button: 48 px tall
    Save button: 52 px tall     (a) Help (b) Save (c) Next
  11. 11.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) dark blue on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  13. 13.Which colour pair is hard to read? (a) black on pale grey (b) pale pink on white (c) white on black (d) black on yellow
  14. 14.True or false: strong colour contrast is good button design. (a) False (b) True
  15. 15.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) yellow on white (d) red on green
  16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Cancel button: 32 px tall
    Next button: 64 px tall
    Start button: 40 px tall
  18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 72 px tall
    Help button: 40 px tall     (a) Save (b) Cancel (c) Help
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 56 px tall
    Cancel button: 64 px tall
    Done button: 40 px tall     (a) Start (b) Send (c) Done (d) Cancel
  22. 22.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Cancel button: 52 px tall
    Done button: 68 px tall     (a) Cancel (b) Done (c) Back
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Save button: 72 px tall
    Back button: 48 px tall     (a) Save (b) Cancel (c) Back
  25. 25.True or false: space between buttons is good button design. (a) False (b) True
  26. 26.True or false: grey text on grey is good button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Start button: 52 px tall
    Next button: 48 px tall
    Cancel button: 32 px tall     (a) Next (b) Cancel (c) Start (d) Save
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Back button: 48 px tall
    Save button: 40 px tall
    Send button: 60 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 40 px tall
    Help button: 36 px tall
    Send button: 52 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 68 px tall
    Help button: 60 px tall
    Start button: 68 px tall     (a) Back (b) Help (c) Start (d) Cancel
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 52 px tall
    Next button: 36 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Done button: 72 px tall
    Cancel button: 44 px tall     (a) Cancel (b) Save (c) Done
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 48 px tall
    Save button: 32 px tall
    Help button: 36 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 52 px tall
    Help button: 52 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 40 px tall
    Back button: 48 px tall
  38. 38.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Cancel button: 32 px tall
    Back button: 48 px tall
    Send button: 64 px tall     (a) Back (b) Cancel (c) Next (d) Send
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?

Answer key

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

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