#516B65
Closest named color: Slate (#516572). oklch(50.5% 0.032 179.2), rgb(81, 107, 101).
Aa
White text reads best on this color (5.76:1).
About this color
#516B65 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.032 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.032 away. White text reads best on it, at 5.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.64:1 |
| White text | 5.76:1 |
Values
| HEX | #516B65 |
| RGB | rgb(81, 107, 101) |
| HSL | hsl(166, 14%, 37%) |
| OKLCH | oklch(50.5% 0.032 179.2) |
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 #516B65 | 5.76:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #516B65 | 3.64:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #516B65 text on white | 5.76:1 | AA | Lc 78.8 | Fine for body text |
| #516B65 text on black | 3.64:1 | AA large text | Lc -23.0 | 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
#D3DBD9
oklch(88.5% 0.009 179.6)
-
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
#75908A
oklch(63.1% 0.032 180.2)
-
Step 600
600
#5E7A74
oklch(55.6% 0.034 180.4)
-
Step 700
700 (this color)
#516B65
oklch(50.5% 0.032 179.2)
-
Step 800
800
#3F544F
oklch(42.7% 0.027 178.7)
-
Step 900
900
#364542
oklch(37.6% 0.02 181.7)
-
Step 950
950
#202926
oklch(27.1% 0.014 173)
#516B65 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) | #696865 | 0.034 |
| Deuteranopia (no green cones) | #646465 | 0.033 |
| Tritanopia (no blue cones) | #4A6C69 | 0.010 |
| Achromatopsia (no color) | #666666 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516B65
#516B65
oklch(50.5% 0.032 179.2)
- #755D64
#755D64
oklch(50.5% 0.033 359)
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 #516B65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.032
- Dim Gray #696969 ΔE 0.036
- Dark Aquamarine #017371 ΔE 0.055
- Deep Turquoise #017374 ΔE 0.056
- Dark Aqua #05696B ΔE 0.059
- Battleship Gray #6C757D ΔE 0.060
- Deep Aqua #08787F ΔE 0.061
- Bluegreen #017A79 ΔE 0.062
Use #516B65 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.