SeaShell color
Inspect SeaShell (#FFF5EE) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
SeaShell color values
SeaShell
#FFF5EE
Black text reads best on this background, at 19.55:1.
SeaShell is one of the 148 CSS named colors, and resolves to #FFF5EE in every browser. In numbers that is rgb(255, 245, 238) and hsl(25, 100%, 97%). Perceptually it is a very light, near-neutral color: OKLCH puts its lightness at 98% and its chroma at 0.014. 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 1.07:1 here, so black text is the safer pairing at 19.55:1. Because it is this light, SeaShell works best as a page or card background with dark text over it.
The closest CSS named colors to SeaShell, measured with CIEDE2000, are Linen (#FAF0E6), FloralWhite (#FFFAF0), Snow (#FFFAFA). If SeaShell is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#FFF5EE
RGB
rgb(255, 245, 238)
HSL
hsl(25, 100%, 97%)
HWB
hwb(25 93% 0%)
CMYK
cmyk(0%, 4%, 7%, 0%)
LAB
lab(97.18 2.59 4.64)
LCH
lch(97.18 5.31 60.82)
OKLCH
oklch(97.6% 0.0143 57.59)
Is SeaShell accessible?
WCAG asks for 4.5:1 between body text and its background. On #FFF5EE white text measures 1.07:1 and black text 19.55:1, so black clears it and white does not.
White text on SeaShell
WCAG 2.2
1.07:1
APCA
Lc 0
Fails AA body text
Fails AAA body text
Fails AA large text
Black text on SeaShell
WCAG 2.2
19.55:1
APCA
Lc 101
Passes AA body text
Passes AAA body text
Passes AA large text
Check SeaShell against any other color in the contrast checker.
Tints and shades of SeaShell
SeaShell sits at 98% OKLCH lightness. Holding its hue and chroma and moving only that value carries it down to #090502, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
Shades, toward black
#C7BDB6
20% darker
#918882
40% darker
#5F5751
60% darker
#312A25
80% darker
#090502
100% darker
Build a full accessible scale from #FFF5EE in the shade generator.
How SeaShell looks with color blindness
The biggest shift is under achromatopsia, where #FFF5EE reads as #F7F7F7, 5 CIEDE2000 units away. If SeaShell is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#F8F5EE
Deuteranopia
#FAF7EE
Tritanopia
#FFF3F3
Achromatopsia
#F7F7F7
Colors similar to SeaShell
The nearest CSS keywords to #FFF5EE, ranked by perceptual distance rather than by how close their hex digits happen to look.