← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 133 · 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.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) dark blue on black
  2. 2.True or false: space between buttons is good button design. (a) True (b) False
  3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 32 px tall
    Cancel button: 40 px tall
    Back button: 40 px tall
  5. 5.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  7. 7.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on dark green (d) black on yellow
  10. 10.True or false: a big, easy tap area is poor button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Next button: 36 px tall
    Send button: 44 px tall
  12. 12.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) white on black (d) yellow on white
  13. 13.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) light grey on white (d) dark blue on black
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  15. 15.True or false: grey text on grey is good button design. (a) True (b) False
  16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.True or false: a clear word like Save is poor button design. (a) False (b) True
  18. 18.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) light grey on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  22. 22.True or false: buttons almost touching is good button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Cancel button: 40 px tall
    Back button: 64 px tall
  24. 24.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.True or false: strong colour contrast is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Start button: 40 px tall
    Done button: 68 px tall
    Back button: 68 px tall     (a) Start (b) Help (c) Done (d) Back
  28. 28.True or false: icons with no meaning is good button design. (a) True (b) False
  29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 60 px tall
    Start button: 40 px tall
    Help button: 64 px tall     (a) Save (b) Start (c) Back (d) Help
  33. 33.True or false: a tiny 20 px button is good button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Send button: 36 px tall
    Next button: 64 px tall
  36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  38. 38.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🌗 Is pale pink on white 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?
    Send button: 32 px tall
    Back button: 56 px tall
    Start button: 52 px tall
    Save button: 44 px tall

Answer key

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

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students