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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 125 · 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.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 40 px tall
    Cancel button: 44 px tall
  3. 3.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) white on dark green (d) white on black
  4. 4.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) white on dark green (d) black on yellow
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Cancel button: 36 px tall
    Next button: 52 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Send button: 32 px tall
    Next button: 64 px tall
  8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  9. 9.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) red on green (d) yellow on white
  10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  11. 11.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 48 px tall
    Help button: 44 px tall
    Send button: 60 px tall     (a) Cancel (b) Next (c) Send (d) Help
  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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 40 px tall
    Send button: 52 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Cancel button: 68 px tall
    Help button: 48 px tall     (a) Help (b) Send (c) Cancel
  16. 16.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) dark blue on black (d) yellow on white
  17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.True or false: space between buttons is poor button design. (a) True (b) False
  19. 19.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  20. 20.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.True or false: icons with no meaning is poor button design. (a) True (b) False
  22. 22.🔘 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
    Send button: 56 px tall
    Back button: 32 px tall
  23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 24 px tall
    Next button: 48 px tall     (a) Next (b) Back (c) Cancel
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Start button: 32 px tall
    Save button: 48 px tall
    Help button: 52 px tall
  26. 26.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) black on pale grey (d) white on dark green
  29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.True or false: space between buttons is good button design. (a) True (b) False
  31. 31.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) white on black (d) black on pale grey
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Save button: 52 px tall
    Send button: 72 px tall     (a) Send (b) Start (c) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Done button: 56 px tall
    Back button: 28 px tall
    Help button: 56 px tall     (a) Help (b) Start (c) Done (d) Back
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Back button: 40 px tall
    Next button: 64 px tall
    Send button: 64 px tall     (a) Help (b) Next (c) Send (d) Back
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 48 px tall
    Done button: 60 px tall
    Help button: 64 px tall     (a) Done (b) Send (c) Help (d) Next
  38. 38.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) pale pink on white (d) yellow on white
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Back button: 64 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Done button: 64 px tall
    Back button: 52 px tall
    Send button: 48 px tall

Answer key

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

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