Inspect LavenderBlush (#FFF0F5) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
LavenderBlush
#FFF0F5
Black text reads best on this background, at 19.03:1.
LavenderBlush is one of the 148 CSS named colors, and resolves to #FFF0F5 in every browser. In numbers that is rgb(255, 240, 245) and hsl(340, 100%, 97%). Perceptually it is a very light, near-neutral color: OKLCH puts its lightness at 97% and its chroma at 0.017. It carries almost no chroma, so it behaves as a neutral rather than as a hue, and belongs with the off-whites.
White text only reaches 1.1:1 here, so black text is the safer pairing at 19.03:1. Because it is this light, LavenderBlush works best as a page or card background with dark text over it.
The closest CSS named colors to LavenderBlush, measured with CIEDE2000, are Snow (#FFFAFA), MistyRose (#FFE4E1), GhostWhite (#F8F8FF). If LavenderBlush is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#FFF0F5
RGB
rgb(255, 240, 245)
HSL
hsl(340, 100%, 97%)
HWB
hwb(340 94% 0%)
CMYK
cmyk(0%, 6%, 4%, 0%)
LAB
lab(96.1 5.86 -0.51)
LCH
lch(96.1 5.88 355.04)
OKLCH
oklch(96.83% 0.0174 355.1)
WCAG asks for 4.5:1 between body text and its background. On #FFF0F5 white text measures 1.1:1 and black text 19.03:1, so black clears it and white does not.
White text on LavenderBlush
WCAG 2.2
1.1:1
APCA
Lc 0
Fails AA body text
Fails AAA body text
Fails AA large text
Black text on LavenderBlush
WCAG 2.2
19.03:1
APCA
Lc 99
Passes AA body text
Passes AAA body text
Passes AA large text
Check LavenderBlush against any other color in the contrast checker.
LavenderBlush sits at 97% OKLCH lightness. Holding its hue and chroma and moving only that value carries it down to #0B0406, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
#C7B9BE
20% darker
#928589
40% darker
#605458
60% darker
#33282C
80% darker
#0B0406
100% darker
Build a full accessible scale from #FFF0F5 in the shade generator.
The biggest shift is under achromatopsia, where #FFF0F5 reads as #F4F4F4, 7.4 CIEDE2000 units away. If LavenderBlush is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#F1F2F5
Deuteranopia
#F4F4F5
Tritanopia
#FFF0F2
Achromatopsia
#F4F4F4
The nearest CSS keywords to #FFF0F5, ranked by perceptual distance rather than by how close their hex digits happen to look.