#518B71
Closest named color: Slate Green (#658D6D). oklch(58.9% 0.074 163.7), rgb(81, 139, 113).
Aa
Black text reads best on this color (5.28:1).
About this color
#518B71 is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.074 and its hue 164°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.024 away. Black text reads best on it, at 5.28:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.074) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #518B71 |
| RGB | rgb(81, 139, 113) |
| HSL | hsl(153, 26%, 43%) |
| OKLCH | oklch(58.9% 0.074 163.7) |
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 #518B71 | 3.97:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #518B71 | 5.28:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #518B71 text on white | 3.97:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #518B71 text on black | 5.28:1 | AA | Lc -34.7 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECE8
oklch(93.6% 0.01 164.9)
-
Step 200
200
#CFDDD6
oklch(88.5% 0.018 164.6)
-
Step 300
300
#AEC8BB
oklch(81% 0.033 164)
-
Step 400
400
#83AB98
oklch(70.6% 0.052 164.3)
-
Step 500
500
#62977E
oklch(63.2% 0.068 163.2)
-
Step 600
600 (this color)
#518B71
oklch(58.9% 0.074 163.7)
-
Step 700
700
#386D56
oklch(49.1% 0.069 163.8)
-
Step 800
800
#2F5946
oklch(42.7% 0.057 163.1)
-
Step 900
900
#2A493B
oklch(37.6% 0.044 163.9)
-
Step 950
950
#192B23
oklch(27% 0.028 164.8)
#518B71 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) | #898370 | 0.073 |
| Deuteranopia (no green cones) | #807D73 | 0.070 |
| Tritanopia (no blue cones) | #428B84 | 0.030 |
| Achromatopsia (no color) | #808080 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #518B71
#518B71
oklch(58.9% 0.074 163.7)
- #9C6B88
#9C6B88
oklch(58.8% 0.074 343.3)
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 #518B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.024
- Dusty Teal #4C9085 ΔE 0.028
- Dark Sage #598556 ΔE 0.036
- Ocean Green #3D9973 ΔE 0.042
- Viridian #1E9167 ΔE 0.045
- Light Forest Green #4F9153 ΔE 0.051
- Green Grey #77926F ΔE 0.051
- Sea Green #2E8B57 ΔE 0.052
Use #518B71 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.