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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 408 · 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.True or false: space between buttons is good button design. (a) True (b) False
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Cancel button: 64 px tall
    Send button: 68 px tall     (a) Cancel (b) Send (c) Back
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 56 px tall
    Help button: 52 px tall
    Next button: 60 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 24 px tall
    Next button: 68 px tall     (a) Cancel (b) Help (c) Next
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 68 px tall
    Help button: 68 px tall     (a) Help (b) Cancel (c) Send
  8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) yellow on white (d) light grey on white
  10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Save button: 52 px tall
    Start button: 64 px tall     (a) Save (b) Start (c) Send
  13. 13.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) yellow on white (d) dark blue on black
  14. 14.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on white (d) pale pink on white
  15. 15.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) white on black (d) dark blue on black
  16. 16.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  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: 48 px tall
    Start button: 36 px tall
    Save button: 52 px tall     (a) Save (b) Start (c) Cancel
  21. 21.True or false: icons with no meaning is poor button design. (a) False (b) True
  22. 22.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on pale grey (d) white on black
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Save button: 48 px tall
    Send button: 36 px tall
    Help button: 68 px tall     (a) Save (b) Send (c) Start (d) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Back button: 48 px tall
    Cancel button: 72 px tall
    Send button: 72 px tall     (a) Done (b) Cancel (c) Back (d) Send
  25. 25.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Start button: 56 px tall
    Send button: 72 px tall     (a) Start (b) Help (c) Send
  27. 27.True or false: grey text on grey is poor button design. (a) False (b) True
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  29. 29.True or false: icons with no meaning is good button design. (a) True (b) False
  30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  32. 32.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on pale grey (d) yellow on white
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Back button: 32 px tall
    Done button: 56 px tall     (a) Done (b) Back (c) Help
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 56 px tall
    Start button: 32 px tall     (a) Back (b) Done (c) Start
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 60 px tall
    Done button: 60 px tall
    Save button: 40 px tall
  36. 36.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Send button: 64 px tall
    Cancel button: 40 px tall
    Done button: 36 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 24 px tall
    Start button: 64 px tall     (a) Cancel (b) Start (c) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 64 px tall
    Back button: 60 px tall
    Start button: 64 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Cancel button: 52 px tall
    Save button: 28 px tall     (a) Save (b) Cancel (c) Start

Answer key

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

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