App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 636 · 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: grey text on grey? (a) good design (b) poor design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
3. 3.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) red on green (d) black on yellow
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on black (d) yellow on white
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 52 px tall
   Help button: 64 px tall
   Done button: 40 px tall (a) Done (b) Help (c) Send
6. 6.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) white on dark green (d) dark blue on black
7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
9. 9.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) dark blue on white
10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Start button: 56 px tall
    Send button: 40 px tall (a) Cancel (b) Start (c) Send
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 52 px tall
    Start button: 52 px tall
13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) white on dark green (d) black on yellow
16. 16.True or false: icons with no meaning is poor button design. (a) True (b) False
17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Done button: 60 px tall
    Back button: 64 px tall
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 48 px tall
    Help button: 60 px tall
22. 22.🌗 Is pale pink on white 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) light grey on white (b) dark blue on black (c) pale pink on white (d) black on pale grey
24. 24.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Save button: 48 px tall
    Back button: 48 px tall (a) Back (b) Done (c) Save
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Help button: 64 px tall
    Save button: 48 px tall
30. 30.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) black on yellow
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
32. 32.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on black (d) dark blue on white
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Save button: 36 px tall
    Back button: 72 px tall
    Help button: 68 px tall (a) Back (b) Save (c) Next (d) Help
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Done button: 36 px tall
    Back button: 64 px tall (a) Send (b) Back (c) Done
36. 36.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
38. 38.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 52 px tall
    Done button: 44 px tall
    Help button: 52 px tall (a) Cancel (b) Help (c) Next (d) Done
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Back button: 56 px tall
    Next button: 56 px tall
    Help button: 56 px tall (a) Send (b) Help (c) Next (d) Back

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