Am I only 1% likely to be my Dad's kid?

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Last night I mentioned affectionately to my sis that I was imagining both our (deceased) parents smiling at us, their blue eyes twinkling. Sis (my only sibling) said Dad had green eyes. I just checked photos and his eyes were definitely blue. I had an odd feeling come over me so Googled whether two blue-eyed parents could have a green eyed (me) kid. 1% possibility. Can anyone gentically savvy increase the odds or tell me what they'd do in my shoes?
Full disclosure: When my Dad died I discovered he'd told my sis he wasn't my dad. I shrugged it off at the time as I'm like him/look like him in some ways... I always thought so anyway. There's a ten year gap between big sis and me. Mum had several miscarriages and they were on the brink of adopting when a pregnancy (me) stuck. I know that my mum had been in love with the husband of a couple they knew.
.... Holy mack mack, I cant believe how in denial I've been for so long about this. Thoughts please!

I’ve got blue eyes, DH brown and DC green.

I would be more concerned about what he told you than eye colour.

Eye colour is complex and not like they teach you at A level. Still you should do a DNA test if you want to know

The eye colour isn't the biggest flag here. .

Do a test if you want to find out. Don't if you don't. It's very much a decision for your heart

"When my Dad died I discovered he'd told my sis he wasn't my dad."
I presume your sister told you that? Three possibilities;

1. She's making it up to hurt you - why?
2. He did say it, but he was mistaken (because he thought your mum had an affair, judging her by his philandering standards)
3. He did say it, and it is true.

He is still your Dad, because that's the role he played in your life 'til the day he died. Is he your bio-dad? Well, you need to decide whether you want to establish that or not. You say you look like him.

"I know that my mum had been in love with the husband of a couple they knew."
Ask yourself if you know-know that, or whether you assume-know that, or whether this is something you've been told with no proof. And even if she had, would she have acted on it?

Consider this possibility of why your dad mistakenly thought you weren't his child: Could the multiple miscarriages have played on your dad's fears? It's common for philanderers to presume everyone else behaves as they do - so much easier than admitting to themselves that their behaviour is wrong and they should change it! So, fearing that, and a pregnancy not miscarrying, he may have brooded on the possibility that this pregnancy was 'different' from the others, and the 'difference' was another man's sperm.

But at the end of the day, he treated you as his child, didn't he? So in the (in my opinion, not that likely) event that he's not your bio-dad - do you want that possibility confirmed? If you do, then I'd see if I could DNA test against another family member - not your sister. I'm considering that maybe she's not your dad's daughter.

No idea on genetics.

Statistics are interesting. Let's suppose for the moment that the 1% figure is true. What that actually means is that it's true for the general population - i.e. that if you had no other facts to deal with that would be the probability.

That's not your case. Your dad told your sister that he wasn't her bio father. He didn't tell you that. You think you look like your dad. Both those are strong arguments in the other direction.

(To give another example. Suppise a DNA test shows that there's a 99% chance X is a burglar. Suppose also that at the time of the burglary X is getting married in front of 200 friends and family plus vicar, string quartet, 3 photographers, etc... The odds of her being in the 1% are much higher than 1%).

If you fancy trawling through a scientific article that will explain how two blue eyed parents could have a green eyes child….

https://www.nature.com/articles/s41433-021-01749-x

My dm has very green eyes. Both her parents are blue, and they are definitely her parents biologically.

And how do you know?

(An explanation will help put the OP at ease.)

Me and DH both have blue eyes, we have two blue eyed children and one green eyed child. He is 100% the father of all three, so it's definitely possible.

I think the eye colour thing is a red herring, what's more concerning is that he actually said he wasn't your father. It's that that you should focus on, if you are worried or it's bothering you.

If you saw my mum next to her dad there would be absolutely no doubt. My daughter is also the spit of my grandad. I showed a photo of him the other day to someone without saying anything and they immediately went "that's your dd2".
No doubt she came out of granny too. Her sisters both witnessed it.😂

Thanks for all the replies. They're helpful.

Sis told me (that Dad had told her he wasnt my dad) the day after he'd suddenly died and I just batted it away as nonsense. Firstly, because he was him. Secondly because she'd been stressing all night about telling me so I wanted to make it stop stressing her and thirdly I think I must have just thought 'can't deal with that too'. I was 30. It was many many years ago. It's so useful writing all this down. Love my sis. We crack each other up whatever the % she's my special relly. I need to ask her more about it though.

My dad has blue eyes. My mum had hazel eyes. Mine are grey/ green/ blue.

Both my DP had blue eyes, I have deep brown eyes

My parents both had blue eyes. Mine are green/grey/blue. DSis and DD have blue eyes. I look scarily like my dad.

She definitely wouldn't make something up to hurt me. She's deeply generous and kind towards me.

Thanks to the posters of two blues having a green.

@WhereYouLeftIt some real gold to pick through in your post re his motivation. He was a gargantuan brooder. (Are you a therapist? Or a writer :) ?)

Thanks @SeaToSki I'll read that.

I have blue eyes, I have 2 children with brown eyes and one with green eyes. Their dad has hazel eyes.

The only way you’ll know is a DNA test.

It is Black Friday so currently they all have big discounts so now is probably the chance to do it.

My dad has very pale blue eyes
My mum has dark brown (so does the rest of the family along with olive tanned skin, dark hair)
Mine are green and I'm an incredibly pale redhead!

This. It's better to know.

The thing is I have noticed if you look closely around the black of your pupil if you have another eye colour gene you can usually see this ring of colour. My hubby has pure blue eyes but I have brown (with a ring of blue around my pupil as my dad has pure blue eyes). My daughter has very dark brown eyes but still has the ring of blue - my son with blue eyes has a ring of brown.
Your dad could have had blue eyes with a ring of green.

I think eye genetics can be weird. I have hazel eyes, ex has brown. We have blue eyed twins. Now my mum had blue eyes but no idea where the gene came from on his side.

I knew twins who were nearly identical but, one had blue eyes and fair hair and one green and red hair.

The 1% is probably due to transcription errors. If someone who didn't know English copied out by hand my post letter by letter one hundred times then you would not think it strange if 1% of the time there was a spelling mistake in it. Genetics is a bit like that. When it is making copies it doesn't know what it is writing, it just copies it the best it can but sometimes it makes a letter error puts an a instead of a t and suddenly mistake becomes misaake. As long as people can still understand it then if that copy was then copied again (you have children) then your DNA is now saying misaake, but it is still close enough to mistake for everyone to still understand it

My eyes are blue and so are DH's. DD's eyes are green with a hazel ring round the iris.

If it wouldn't cause you pain and suffering to find out he isn't your dad, then I'd go for the DNA test to find out if you and your sister are full siblings or half siblings. Peace of mind. (And I wish it had existed 40 years ago when I was in mental turmoil over a similar issue).