← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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