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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 18 · 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.

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

Answer key

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

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