#516A64
Closest named color: Slate (#516572). oklch(50.2% 0.031 178.6), rgb(81, 106, 100).
Aa
White text reads best on this color (5.84:1).
About this color
#516A64 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.031 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 5.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.59:1 |
| White text | 5.84:1 |
Values
| HEX | #516A64 |
| RGB | rgb(81, 106, 100) |
| HSL | hsl(166, 13%, 37%) |
| OKLCH | oklch(50.2% 0.031 178.6) |
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 #516A64 | 5.84:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #516A64 | 3.59:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #516A64 text on white | 5.84:1 | AA | Lc 79.2 | Fine for body text |
| #516A64 text on black | 3.59:1 | AA large text | Lc -22.6 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBEA
oklch(93.7% 0.004 179.7)
-
Step 200
200
#D4DBD9
oklch(88.5% 0.008 177.3)
-
Step 300
300
#B7C4C1
oklch(80.9% 0.015 180.6)
-
Step 400
400
#91A6A1
oklch(70.7% 0.025 179.6)
-
Step 500
500
#76908A
oklch(63.1% 0.031 179.7)
-
Step 600
600
#5F7A73
oklch(55.6% 0.033 177.4)
-
Step 700
700 (this color)
#516A64
oklch(50.2% 0.031 178.6)
-
Step 800
800
#40544F
oklch(42.7% 0.026 178)
-
Step 900
900
#364542
oklch(37.6% 0.02 181.7)
-
Step 950
950
#202926
oklch(27.1% 0.014 173)
#516A64 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) | #686764 | 0.033 |
| Deuteranopia (no green cones) | #636364 | 0.032 |
| Tritanopia (no blue cones) | #4B6B68 | 0.009 |
| Achromatopsia (no color) | #656565 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516A64
#516A64
oklch(50.2% 0.031 178.6)
- #735D63
#735D63
oklch(50.2% 0.03 0)
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 #516A64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Dim Gray #696969 ΔE 0.036
- Dark Aquamarine #017371 ΔE 0.056
- Deep Turquoise #017374 ΔE 0.057
- Dark Aqua #05696B ΔE 0.059
- Battleship Gray #6C757D ΔE 0.062
- Dark Green Blue #1F6357 ΔE 0.062
- Deep Aqua #08787F ΔE 0.063
Use #516A64 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.