App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 50 · 40 questions

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.

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

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