App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 478 · 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. Which button is too small?
   Back button: 48 px tall
   Send button: 60 px tall
   Done button: 24 px tall
   Help button: 72 px tall (a) Help (b) Back (c) Done (d) Send
2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 48 px tall
   Next button: 64 px tall
   Start button: 56 px tall
4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
6. 6.True or false: grey text on grey is poor button design. (a) False (b) True
7. 7.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) pale pink on white (d) light grey on white
8. 8.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on pale grey
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 64 px tall
   Done button: 44 px tall
   Cancel button: 60 px tall
   Help button: 40 px tall
10. 10.True or false: strong colour contrast is good button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
12. 12.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) light grey on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 32 px tall
    Done button: 52 px tall
    Next button: 64 px tall (a) Back (b) Save (c) Done (d) Next
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) red on green (d) yellow on white
15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
16. 16.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) white on dark green (d) black on yellow
17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 32 px tall
    Next button: 60 px tall (a) Send (b) Next (c) Back
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 48 px tall
    Save button: 64 px tall
    Next button: 40 px tall (a) Save (b) Cancel (c) Help (d) Next
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
21. 21.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Help button: 32 px tall
    Next button: 48 px tall (a) Help (b) Start (c) Next
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Start button: 36 px tall
    Cancel button: 40 px tall
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.True or false: space between buttons is good button design. (a) True (b) False
28. 28.🌗 Is white on dark green 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. Which button is too small?
    Next button: 72 px tall
    Back button: 24 px tall
    Start button: 48 px tall (a) Back (b) Next (c) Start
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
31. 31.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) dark blue on white (d) white on dark green
32. 32.True or false: grey text on grey is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Back button: 44 px tall
    Next button: 52 px tall (a) Start (b) Back (c) Next
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.True or false: space between buttons is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 52 px tall
    Help button: 32 px tall
    Back button: 72 px tall (a) Save (b) Send (c) Help (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 52 px tall
    Next button: 48 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 36 px tall
    Send button: 40 px tall
    Help button: 32 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Done button: 60 px tall
    Back button: 52 px tall

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