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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 325 · 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. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 36 px tall
    Start button: 60 px tall
  2. 2.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on dark green (d) white on black
  3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Start button: 52 px tall
    Send button: 48 px tall     (a) Send (b) Help (c) Start
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Send button: 32 px tall
    Next button: 56 px tall
    Start button: 64 px tall
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Help button: 64 px tall
    Send button: 60 px tall     (a) Help (b) Done (c) Send
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 64 px tall
    Save button: 60 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 32 px tall
    Start button: 36 px tall
  10. 10.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) pale pink on white
  11. 11.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) yellow on white (d) dark blue on black
  12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 32 px tall
    Back button: 40 px tall
    Start button: 32 px tall
  14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Next button: 44 px tall
    Save button: 36 px tall
  16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.True or false: grey text on grey is good button design. (a) True (b) False
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 64 px tall
    Start button: 72 px tall
    Save button: 52 px tall     (a) Send (b) Save (c) Start (d) Cancel
  20. 20.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) yellow on white
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 24 px tall
    Help button: 64 px tall
    Back button: 56 px tall     (a) Start (b) Help (c) Back (d) Cancel
  22. 22.True or false: buttons almost touching is poor button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 56 px tall
    Save button: 64 px tall     (a) Send (b) Save (c) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Done button: 68 px tall
    Send button: 72 px tall
    Cancel button: 40 px tall     (a) Next (b) Cancel (c) Done (d) Send
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  26. 26.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.True or false: space between buttons is good button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Start button: 64 px tall
    Send button: 40 px tall     (a) Save (b) Start (c) Send
  29. 29.True or false: space between buttons is poor button design. (a) False (b) True
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Help button: 52 px tall
    Back button: 56 px tall     (a) Back (b) Start (c) Help
  31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 48 px tall
    Save button: 32 px tall
    Next button: 68 px tall     (a) Save (b) Back (c) Done (d) Next
  34. 34.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 64 px tall
    Send button: 44 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Help button: 64 px tall
    Send button: 56 px tall
    Done button: 44 px tall

Answer key

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

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