#186F59
Closest named color: Dark Aquamarine (#017371). oklch(48.6% 0.087 171.3), rgb(24, 111, 89).
Aa
White text reads best on this color (6.07:1).
About this color
#186F59 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.087 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.036 away. White text reads best on it, at 6.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.45:1 |
| White text | 6.07:1 |
Values
| HEX | #186F59 |
| RGB | rgb(24, 111, 89) |
| HSL | hsl(165, 64%, 26%) |
| OKLCH | oklch(48.6% 0.087 171.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #186F59 | 6.07:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #186F59 | 3.45:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #186F59 text on white | 6.07:1 | AA | Lc 80.0 | Fine for body text |
| #186F59 text on black | 3.45:1 | AA large text | Lc -21.8 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A6CABD
oklch(80.9% 0.043 171.3)
-
Step 400
400
#74AF9B
oklch(70.8% 0.068 171)
-
Step 500
500
#4C9A83
oklch(63% 0.085 171.9)
-
Step 600
600
#2A856C
oklch(55.6% 0.094 171)
-
Step 700
700 (this color)
#186F59
oklch(48.6% 0.087 171.3)
-
Step 800
800
#1A5C4A
oklch(42.8% 0.072 171.1)
-
Step 900
900
#1D4B3E
oklch(37.7% 0.055 172)
-
Step 950
950
#122C24
oklch(27% 0.036 171.2)
#186F59 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6B6758 | 0.089 |
| Deuteranopia (no green cones) | #605F5B | 0.086 |
| Tritanopia (no blue cones) | #007069 | 0.024 |
| Achromatopsia (no color) | #626262 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #186F59
#186F59
oklch(48.6% 0.087 171.3)
- #844A65
#844A65
oklch(48.7% 0.086 351.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #186F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Aqua #05696B ΔE 0.040
- Deep Turquoise #017374 ΔE 0.040
- Bluegreen #017A79 ΔE 0.051
- Deep Aqua #08787F ΔE 0.058
- Spruce #0A5F38 ΔE 0.063
- Pine #2B5D34 ΔE 0.065
Use #186F59 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.