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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 507 · 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 Help button is 28 px tall. How many px taller must it be?
  2. 2.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  5. 5.True or false: buttons almost touching is poor button design. (a) False (b) True
  6. 6.True or false: strong colour contrast is good button design. (a) True (b) False
  7. 7.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) red on green (d) dark blue on white
  8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Back button: 48 px tall
    Done button: 36 px tall
    Cancel button: 64 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  11. 11.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) dark blue on white (d) light grey on white
  12. 12.True or false: a clear word like Save is good button design. (a) False (b) True
  13. 13.True or false: icons with no meaning is good button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  15. 15.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on pale grey (d) light grey on white
  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.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Back button: 48 px tall
    Done button: 28 px tall     (a) Back (b) Help (c) Done
  19. 19.True or false: space between buttons is poor button design. (a) True (b) False
  20. 20.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on yellow (d) light grey on white
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Start button: 48 px tall
    Cancel button: 60 px tall
    Save button: 28 px tall     (a) Start (b) Cancel (c) Help (d) Save
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 40 px tall
    Cancel button: 48 px tall
  24. 24.True or false: grey text on grey is poor button design. (a) False (b) True
  25. 25.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) white on dark green
  26. 26.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) yellow on white (d) pale pink on white
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  30. 30.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) pale pink on white (d) white on dark green
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  33. 33.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
  35. 35.True or false: a clear word like Save is poor button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Send button: 48 px tall
    Start button: 48 px tall
    Next button: 24 px tall     (a) Start (b) Next (c) Send (d) Save
  37. 37.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🌗 Is black on yellow 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. The Send button is 28 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?

Answer key

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

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