Inspect DarkCyan (#008B8B) in HEX, RGB, HSL, LCH and OKLCH, check its contrast, and copy the value you need.
DarkCyan
#008B8B
Black text reads best on this background, at 5.07:1.
DarkCyan is one of the 148 CSS named colors, and resolves to #008B8B in every browser. In numbers that is rgb(0, 139, 139) and hsl(180, 100%, 27%). Perceptually it is a mid-toned, muted color: OKLCH puts its lightness at 58% and its chroma at 0.098. It sits in the cyans at 195 degrees of OKLCH hue, and reads as a cool color.
White text only reaches 4.15:1 here, so black text is the safer pairing at 5.07:1. 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 DarkCyan, measured with CIEDE2000, are Teal (#008080), CadetBlue (#5F9EA0), LightSeaGreen (#20B2AA). If DarkCyan is not quite right, those are the nearest keywords to try before reaching for a custom value.
HEX
#008B8B
RGB
rgb(0, 139, 139)
HSL
hsl(180, 100%, 27%)
HWB
hwb(180 0% 45%)
CMYK
cmyk(100%, 0%, 0%, 45%)
LAB
lab(51.92 -32.26 -9.53)
LCH
lch(51.92 33.63 196.45)
OKLCH
oklch(57.65% 0.0984 194.77)
WCAG asks for 4.5:1 between body text and its background. On #008B8B white text measures 4.15:1 and black text 5.07:1, so black clears it and white does not.
White text on DarkCyan
WCAG 2.2
4.15:1
APCA
Lc 73
Fails AA body text
Fails AAA body text
Passes AA large text
Black text on DarkCyan
WCAG 2.2
5.07:1
APCA
Lc 36
Passes AA body text
Fails AAA body text
Passes AA large text
Check DarkCyan against any other color in the contrast checker.
DarkCyan sits at 58% OKLCH lightness. Holding its hue and chroma and moving only that value carries it up to #E4FFFE and down to #000808, which keeps the family recognizable instead of letting it drift toward gray the way a plain HSL ramp does.
#33A4A4
20% lighter
#52BEBD
40% lighter
#6ED8D7
60% lighter
#89F3F2
80% lighter
#E4FFFE
100% lighter
#006D6D
20% darker
#005151
40% darker
#003636
60% darker
#001E1E
80% darker
#000808
100% darker
Build a full accessible scale from #008B8B in the shade generator.
Hues rotated around #008B8B 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.
DarkCyan sits at 195 degrees. Rotating it a half turn lands on 15 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 DarkCyan at 165 and 225 degrees. They stay close enough to read as the same family, which is what you want for hover states, secondary surfaces and gradients.
195, 315 and 75 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 15 degrees, this pair flanks it at 345 and 45. You keep most of the contrast of a complementary pairing while losing the harshness.
Explore more combinations around DarkCyan on the color wheel.
The biggest shift is under deuteranopia, where #008B8B reads as #58648D, 27 CIEDE2000 units away. If DarkCyan is the only thing marking a state or a series, roughly one viewer in twelve will miss it.
Protanopia
#767B8C
Deuteranopia
#58648D
Tritanopia
#00968A
Achromatopsia
#6D6D6D
The nearest CSS keywords to #008B8B, ranked by perceptual distance rather than by how close their hex digits happen to look.