App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 369 · 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.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on pale grey (d) red on green
4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good 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.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 72 px tall
   Help button: 44 px tall
   Done button: 60 px tall (a) Done (b) Help (c) Back
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
11. 11.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on dark green (d) red on green
12. 12.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) dark blue on black (d) pale pink on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 36 px tall
    Save button: 40 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 44 px tall
    Help button: 64 px tall (a) Cancel (b) Help (c) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
16. 16.True or false: strong colour contrast is poor button design. (a) True (b) False
17. 17.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) dark blue on white
18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
21. 21.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) dark blue on black (d) red on green
22. 22.True or false: a big, easy tap area is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Done button: 48 px tall
    Send button: 64 px tall
    Help button: 48 px tall (a) Done (b) Start (c) Send (d) Help
24. 24.Which colour pair is easy to read? (a) red on green (b) white on black (c) pale pink on white (d) light grey on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 36 px tall
    Done button: 56 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Help button: 52 px tall
    Back button: 48 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
29. 29.🌗 Is white on dark green 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?
    Send button: 48 px tall
    Save button: 40 px tall
    Cancel button: 52 px tall (a) Cancel (b) Send (c) Save
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Cancel button: 32 px tall
    Help button: 36 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 48 px tall
    Back button: 52 px tall (a) Next (b) Cancel (c) Back
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 72 px tall
    Done button: 68 px tall
    Save button: 36 px tall (a) Done (b) Cancel (c) Start (d) Save
34. 34.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) white on dark green (d) black on yellow
37. 37.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 40 px tall
    Cancel button: 36 px tall
    Done button: 32 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 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?
    Send button: 48 px tall
    Back button: 36 px tall
    Start button: 64 px tall

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