#516B64
Closest named color: Slate (#516572). oklch(50.5% 0.033 176.6), rgb(81, 107, 100).
Aa
White text reads best on this color (5.77:1).
About this color
#516B64 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.033 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.034 away. White text reads best on it, at 5.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #516B64 |
| RGB | rgb(81, 107, 100) |
| HSL | hsl(164, 14%, 37%) |
| OKLCH | oklch(50.5% 0.033 176.6) |
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 #516B64 | 5.77:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #516B64 | 3.63:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #516B64 text on white | 5.77:1 | AA | Lc 78.9 | Fine for body text |
| #516B64 text on black | 3.63:1 | AA large text | Lc -22.9 | 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
#B7C4C0
oklch(80.9% 0.015 175.6)
-
Step 400
400
#91A6A0
oklch(70.7% 0.025 176.5)
-
Step 500
500
#759089
oklch(63% 0.032 177.7)
-
Step 600
600
#5E7A73
oklch(55.5% 0.034 178)
-
Step 700
700 (this color)
#516B64
oklch(50.5% 0.033 176.6)
-
Step 800
800
#3F544E
oklch(42.6% 0.028 175.5)
-
Step 900
900
#364541
oklch(37.6% 0.02 177.1)
-
Step 950
950
#202926
oklch(27.1% 0.014 173)
#516B64 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) | #696864 | 0.035 |
| 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°).
- #516B64
#516B64
oklch(50.5% 0.033 176.6)
- #755D65
#755D65
oklch(50.5% 0.033 356.4)
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 #516B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.034
- 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 0.061
- Deep Aqua #08787F ΔE 0.062
- Bluegreen #017A79 ΔE 0.062
Use #516B64 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.