App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 595 · 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.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on yellow (d) pale pink on white
2. 2.True or false: buttons almost touching is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
4. 4.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) red on green (d) pale pink on white
5. 5.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 60 px tall
   Done button: 56 px tall
   Back button: 44 px tall
   Cancel button: 68 px tall (a) Done (b) Save (c) Back (d) Cancel
7. 7.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) yellow on white (d) red on green
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) red on green (d) light grey on white
11. 11.True or false: icons with no meaning is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Back button: 60 px tall
    Save button: 68 px tall (a) Save (b) Back (c) Next
13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.True or false: strong colour contrast is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) dark blue on white (d) white on dark green
19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 32 px tall
    Back button: 60 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 52 px tall
    Send button: 52 px tall (a) Next (b) Cancel (c) Send
24. 24.True or false: a big, easy tap area is poor button design. (a) False (b) True
25. 25.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) black on yellow (d) black on pale grey
26. 26.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 pale grey
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Help button: 56 px tall
    Done button: 36 px tall
    Next button: 48 px tall (a) Back (b) Done (c) Next (d) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 72 px tall
    Back button: 44 px tall
    Send button: 52 px tall (a) Back (b) Send (c) Done (d) Cancel
29. 29.True or false: a big, easy tap area is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Send button: 36 px tall
    Help button: 60 px tall
    Done button: 68 px tall (a) Start (b) Send (c) Help (d) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 56 px tall
    Back button: 60 px tall (a) Back (b) Send (c) Help
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 56 px tall
    Cancel button: 52 px tall
    Next button: 40 px tall (a) Cancel (b) Done (c) Save (d) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Help button: 32 px tall
    Next button: 56 px tall (a) Help (b) Save (c) Next
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Cancel button: 32 px tall
    Help button: 40 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 48 px tall
    Send button: 60 px tall
    Done button: 36 px tall (a) Back (b) Next (c) Send (d) Done
39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Done button: 48 px tall
    Help button: 56 px tall (a) Help (b) Done (c) Back

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