App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 127 · 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 black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) light grey on white
3. 3.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) black on pale grey (d) dark blue on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 68 px tall
   Save button: 56 px tall
   Back button: 40 px tall (a) Send (b) Save (c) Back
6. 6.True or false: strong colour contrast is good button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
8. 8.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) white on black (d) dark blue on white
9. 9.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Send button: 56 px tall
    Start button: 28 px tall (a) Send (b) Start (c) Help
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: space between buttons is poor button design. (a) False (b) True
14. 14.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Send button: 68 px tall
    Help button: 64 px tall
    Done button: 72 px tall (a) Done (b) Help (c) Next (d) Send
16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
18. 18.True or false: grey text on grey is good button design. (a) True (b) False
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.True or false: icons with no meaning is good button design. (a) True (b) False
22. 22.🌗 Is light grey 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) black on yellow (b) yellow on white (c) pale pink on white (d) dark blue on black
24. 24.True or false: grey text on grey is poor button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 68 px tall
    Cancel button: 68 px tall (a) Cancel (b) Done (c) Send
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 72 px tall
    Back button: 60 px tall (a) Send (b) Back (c) Cancel
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Done button: 72 px tall
    Start button: 68 px tall (a) Help (b) Start (c) Done
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 64 px tall
    Send button: 60 px tall
    Help button: 36 px tall (a) Next (b) Send (c) Cancel (d) Help
29. 29.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) yellow on white
30. 30.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on black (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Cancel button: 28 px tall
    Save button: 48 px tall
    Start button: 60 px tall (a) Done (b) Start (c) Cancel (d) Save
35. 35.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) pale pink on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 56 px tall
    Next button: 48 px tall (a) Save (b) Next (c) Help
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 36 px tall
    Save button: 64 px tall
    Back button: 64 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?

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