App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 413 · 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.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 68 px tall
   Back button: 72 px tall
   Cancel button: 32 px tall (a) Cancel (b) Next (c) Back
3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
5. 5.True or false: a clear word like Save is poor button design. (a) False (b) True
6. 6.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) red on green (d) dark blue on black
7. 7.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) light grey on white
8. 8.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on dark green (d) white on black
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
10. 10.True or false: a big, easy tap area is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 28 px tall
    Done button: 68 px tall
    Back button: 64 px tall (a) Start (b) Save (c) Back (d) Done
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 60 px tall
    Start button: 64 px tall
    Save button: 68 px tall (a) Cancel (b) Start (c) Send (d) Save
13. 13.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) dark blue on white (d) black on yellow
14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
16. 16.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) dark blue on white
18. 18.True or false: icons with no meaning is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 44 px tall
    Send button: 40 px tall
    Done button: 48 px tall
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) light grey on white (d) yellow on white
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 40 px tall
    Cancel button: 52 px tall
    Save button: 64 px tall
26. 26.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) red on green (d) pale pink on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
29. 29.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on dark green (d) dark blue on white
30. 30.True or false: space between buttons is poor button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 40 px tall
    Save button: 64 px tall
32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
34. 34.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) pale pink on white
35. 35.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 40 px tall
    Help button: 60 px tall (a) Back (b) Done (c) Help
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Save button: 48 px tall
    Back button: 52 px tall (a) Save (b) Cancel (c) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?

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