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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 416 · 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 hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on white (d) light grey on white
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  5. 5.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) red on green (d) light grey on white
  6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Back button: 64 px tall
    Save button: 64 px tall
    Cancel button: 32 px tall
  8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Back button: 52 px tall
    Save button: 60 px tall     (a) Back (b) Save (c) Next
  12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.True or false: a tiny 20 px button is good button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  16. 16.🌗 Is yellow on white 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. Which button is too small?
    Back button: 52 px tall
    Send button: 72 px tall
    Help button: 72 px tall
    Save button: 40 px tall     (a) Save (b) Send (c) Help (d) Back
  18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
  19. 19.True or false: a clear word like Save is poor button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Done button: 56 px tall
    Start button: 36 px tall
    Save button: 64 px tall     (a) Next (b) Done (c) Save (d) Start
  21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.True or false: grey text on grey is poor button design. (a) True (b) False
  23. 23.True or false: buttons almost touching is good button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 52 px tall
    Send button: 24 px tall     (a) Cancel (b) Help (c) Send
  26. 26.True or false: a big, easy tap area is good button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Back button: 56 px tall
    Send button: 60 px tall     (a) Send (b) Back (c) Start
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 52 px tall
    Start button: 48 px tall
    Cancel button: 36 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Done button: 52 px tall
    Send button: 68 px tall     (a) Cancel (b) Send (c) Done
  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?
    Cancel button: 52 px tall
    Start button: 40 px tall
    Save button: 64 px tall
    Next button: 72 px tall     (a) Cancel (b) Save (c) Next (d) Start
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Help button: 60 px tall
    Next button: 40 px tall     (a) Done (b) Help (c) Next
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  34. 34.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) black on pale grey
  35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 64 px tall
    Done button: 56 px tall
    Back button: 36 px tall     (a) Save (b) Back (c) Send (d) Done
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 32 px tall
    Start button: 48 px tall
    Send button: 40 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Back button: 60 px tall
    Save button: 48 px tall
    Start button: 64 px tall     (a) Start (b) Save (c) Done (d) Back
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Done button: 64 px tall
    Save button: 40 px tall
    Next button: 64 px tall
  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. light grey on white
  2. 4
  3. poor design
  4. 24
  5. white on dark green
  6. good design
  7. 2
  8. True
  9. 16
  10. 12
  11. Next
  12. hard to read
  13. easy to read
  14. False
  15. 16
  16. hard to read
  17. Save
  18. False
  19. False
  20. Start
  21. hard to read
  22. True
  23. False
  24. 8
  25. Send
  26. True
  27. Start
  28. 2
  29. Cancel
  30. poor design
  31. Start
  32. Next
  33. 4
  34. black on pale grey
  35. easy to read
  36. Back
  37. 2
  38. Done
  39. 3
  40. 28

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