Inspect DarkSeaGreen (#8FBC8F) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
DarkSeaGreen
#8FBC8F
Black text reads best on this background, at 9.76:1.
DarkSeaGreen is one of the 148 CSS named colors, and resolves to #8FBC8F in every browser. In numbers that is rgb(143, 188, 143) and hsl(120, 25%, 65%). Perceptually it is a light, muted color: OKLCH puts its lightness at 75% and its chroma at 0.08. It sits in the greens at 145 degrees of OKLCH hue, and reads as a cool color.
White text only reaches 2.15:1 here, so black text is the safer pairing at 9.76:1. That combination of lightness and chroma makes it a workable mid-tone, the kind of value that lands in the middle of a shade scale.
The closest CSS named colors to DarkSeaGreen, measured with CIEDE2000, are MediumAquaMarine (#66CDAA), MediumSeaGreen (#3CB371), LightGreen (#90EE90). If DarkSeaGreen is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#8FBC8F
RGB
rgb(143, 188, 143)
HSL
hsl(120, 25%, 65%)
HWB
hwb(120 56% 26%)
CMYK
cmyk(24%, 0%, 24%, 26%)
LAB
lab(72.11 -22.2 17.81)
LCH
lch(72.11 28.46 141.27)
OKLCH
oklch(75.09% 0.0797 144.73)
WCAG asks for 4.5:1 between body text and its background. On #8FBC8F white text measures 2.15:1 and black text 9.76:1, so black clears it and white does not.
White text on DarkSeaGreen
WCAG 2.2
2.15:1
APCA
Lc 46
Fails AA body text
Fails AAA body text
Fails AA large text
Black text on DarkSeaGreen
WCAG 2.2
9.76:1
APCA
Lc 61
Passes AA body text
Passes AAA body text
Passes AA large text
Check DarkSeaGreen against any other color in the contrast checker.
DarkSeaGreen sits at 75% OKLCH lightness. Holding its hue and chroma and moving only that value carries it up to #EBFFEB and down to #000901, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
#9DCB9D
20% lighter
#ACDAAB
40% lighter
#BAE9BA
60% lighter
#C9F8C9
80% lighter
#EBFFEB
100% lighter
#699569
20% darker
#456F46
40% darker
#224B24
60% darker
#002A04
80% darker
#000901
100% darker
Build a full accessible scale from #8FBC8F in the shade generator.
Hues rotated around #8FBC8F in OKLCH, then pulled back into the sRGB gamut. Each swatch is labelled with the nearest CSS named color so you have a keyword to start from.
DarkSeaGreen sits at 145 degrees. Rotating it a half turn lands on 325 degrees, the hue directly opposite. It is the strongest pairing you can make without changing lightness, and the one most likely to vibrate if you use both at full chroma.
The neighbors of DarkSeaGreen at 115 and 175 degrees. They stay close enough to read as the same family, which is what you want for hover states, secondary surfaces and gradients.
145, 265 and 25 degrees divide the wheel into thirds. Balanced enough to carry a whole palette without one color dominating the other two.
Instead of the complement at 325 degrees, this pair flanks it at 295 and 355. You keep most of the contrast of a complementary pairing while losing the harshness.
Explore more combinations around DarkSeaGreen on the color wheel.
The biggest shift is under achromatopsia, where #8FBC8F reads as #AFAFAF, 20.6 CIEDE2000 units away. If DarkSeaGreen is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#BEB28D
Deuteranopia
#B6AD91
Tritanopia
#8CB9AE
Achromatopsia
#AFAFAF
The nearest CSS keywords to #8FBC8F, ranked by perceptual distance rather than by how close their hex digits happen to look.