App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 262 · 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 this good or poor button design: a big, easy tap area? (a) poor design (b) good design
2. 2.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) black on pale grey (d) black on yellow
3. 3.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) dark blue on white (d) white on dark green
4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
5. 5.True or false: strong colour contrast is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 40 px tall
   Back button: 64 px tall
   Next button: 60 px tall
7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 68 px tall
    Save button: 44 px tall (a) Cancel (b) Done (c) Save
11. 11.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) dark blue on black
12. 12.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) pale pink on white (d) light grey on white
13. 13.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
15. 15.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on black (d) dark blue on black
16. 16.True or false: buttons almost touching is poor button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
18. 18.True or false: buttons almost touching is good button design. (a) False (b) True
19. 19.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) red on green (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 52 px tall
    Save button: 32 px tall
    Cancel button: 40 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
22. 22.Which colour pair is hard to read? (a) red on green (b) white on black (c) black on yellow (d) white on dark green
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 32 px tall
    Done button: 72 px tall (a) Cancel (b) Send (c) Done
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 68 px tall
    Done button: 28 px tall (a) Next (b) Cancel (c) Done
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Help button: 36 px tall
    Cancel button: 52 px tall
    Start button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
27. 27.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) dark blue on black (d) dark blue on white
29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 40 px tall
    Send button: 32 px tall
    Start button: 52 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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?
    Help button: 60 px tall
    Start button: 48 px tall
    Send button: 32 px tall (a) Help (b) Start (c) Send
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 40 px tall
    Next button: 44 px tall
    Help button: 48 px tall
34. 34.True or false: grey text on grey is good button design. (a) True (b) False
35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 48 px tall
    Back button: 52 px tall
    Start button: 64 px tall (a) Help (b) Next (c) Start (d) Back
37. 37.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Start button: 32 px tall
    Done button: 36 px tall
39. 39.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Next button: 52 px tall
    Back button: 48 px tall (a) Next (b) Save (c) Back

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