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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 467 · 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 yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 28 px tall
    Save button: 60 px tall
    Send button: 52 px tall     (a) Send (b) Save (c) Done (d) Back
  3. 3.True or false: a clear word like Save is poor button design. (a) False (b) True
  4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Cancel button: 44 px tall
    Send button: 44 px tall
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Send button: 56 px tall
    Start button: 68 px tall
    Done button: 52 px tall     (a) Done (b) Send (c) Help (d) Start
  10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  11. 11.True or false: space between buttons is poor button design. (a) False (b) True
  12. 12.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) pale pink on white
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  14. 14.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  15. 15.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.True or false: icons with no meaning is good button design. (a) True (b) False
  17. 17.True or false: icons with no meaning is poor button design. (a) True (b) False
  18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.True or false: buttons almost touching is poor button design. (a) True (b) False
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  21. 21.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) black on pale grey (d) black on yellow
  22. 22.True or false: grey text on grey is poor button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  24. 24.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) white on black
  25. 25.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
  26. 26.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) dark blue on white (d) yellow on white
  27. 27.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) light grey on white (d) yellow on white
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Start button: 32 px tall
    Save button: 44 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  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.True or false: grey text on grey is good button design. (a) False (b) True
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 68 px tall
    Cancel button: 56 px tall     (a) Send (b) Cancel (c) Done
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  34. 34.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) pale pink on white
  35. 35.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  37. 37.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) white on dark green (d) red on green
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Save button: 48 px tall
    Start button: 68 px tall     (a) Start (b) Save (c) Send
  39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Back button: 32 px tall
    Done button: 56 px tall

Answer key

  1. hard to read
  2. Back
  3. False
  4. good design
  5. 0
  6. poor design
  7. 24
  8. easy to read
  9. Help
  10. poor design
  11. False
  12. pale pink on white
  13. 28
  14. good design
  15. easy to read
  16. False
  17. True
  18. hard to read
  19. True
  20. 16
  21. light grey on white
  22. True
  23. 28
  24. white on black
  25. red on green
  26. dark blue on white
  27. black on yellow
  28. 0
  29. 24
  30. hard to read
  31. False
  32. Done
  33. 20
  34. black on pale grey
  35. poor design
  36. 8
  37. white on dark green
  38. Send
  39. easy to read
  40. 2

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