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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 88 · 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 white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 32 px tall
    Help button: 44 px tall
    Start button: 40 px tall
  3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.True or false: a clear word like Save is poor button design. (a) False (b) True
  7. 7.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) dark blue on white (d) white on dark green
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 40 px tall
    Next button: 36 px tall
    Save button: 56 px tall
  11. 11.True or false: a big, easy tap area is good button design. (a) True (b) False
  12. 12.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) pale pink on white
  13. 13.True or false: a tiny 20 px button is good button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 60 px tall
    Start button: 60 px tall
    Next button: 36 px tall     (a) Done (b) Start (c) Cancel (d) Next
  15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  21. 21.True or false: strong colour contrast is poor button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Send button: 48 px tall
    Back button: 56 px tall
    Save button: 64 px tall     (a) Next (b) Back (c) Save (d) Send
  23. 23.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on black (d) white on black
  24. 24.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Send button: 56 px tall
    Cancel button: 44 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  27. 27.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on pale grey (d) pale pink on white
  28. 28.🌗 Is yellow 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 Back button is 32 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Save button: 56 px tall
    Done button: 64 px tall     (a) Done (b) Send (c) Save
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Back button: 52 px tall
    Cancel button: 36 px tall
    Help button: 72 px tall     (a) Cancel (b) Help (c) Send (d) Back
  32. 32.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) dark blue on white (d) white on dark green
  33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  34. 34.True or false: grey text on grey is good button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Start button: 48 px tall
    Next button: 64 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 32 px tall
    Help button: 48 px tall
    Cancel button: 52 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Next button: 36 px tall
    Help button: 44 px tall
    Save button: 64 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Start button: 52 px tall
    Next button: 52 px tall
    Send button: 40 px tall     (a) Save (b) Next (c) Start (d) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 36 px tall
    Back button: 64 px tall
  40. 40.True or false: a clear word like Save is good button design. (a) True (b) False

Answer key

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

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