#516C64
Closest named color: Slate (#516572). oklch(50.7% 0.034 174.8), rgb(81, 108, 100).
Aa
White text reads best on this color (5.70:1).
About this color
#516C64 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.034 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.036 away. White text reads best on it, at 5.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.67:1 |
| White text | 5.70:1 |
Values
| HEX | #516C64 |
| RGB | rgb(81, 108, 100) |
| HSL | hsl(162, 14%, 37%) |
| OKLCH | oklch(50.7% 0.034 174.8) |
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 #516C64 | 5.70:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #516C64 | 3.67:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #516C64 text on white | 5.70:1 | AA | Lc 78.5 | Fine for body text |
| #516C64 text on black | 3.67:1 | AA large text | Lc -23.2 | 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
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D3DBD9
oklch(88.5% 0.009 179.6)
-
Step 300
300
#B6C4C0
oklch(80.8% 0.016 177)
-
Step 400
400
#90A69F
oklch(70.6% 0.027 174.4)
-
Step 500
500
#759088
oklch(63% 0.033 175.3)
-
Step 600
600
#5D7B72
oklch(55.7% 0.037 174.5)
-
Step 700
700 (this color)
#516C64
oklch(50.7% 0.034 174.8)
-
Step 800
800
#3F544E
oklch(42.6% 0.028 175.5)
-
Step 900
900
#364641
oklch(37.9% 0.022 174)
-
Step 950
950
#1F2926
oklch(27% 0.015 174.9)
#516C64 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) | #6A6964 | 0.036 |
| Deuteranopia (no green cones) | #656565 | 0.034 |
| Tritanopia (no blue cones) | #4A6D6A | 0.011 |
| Achromatopsia (no color) | #666666 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516C64
#516C64
oklch(50.7% 0.034 174.8)
- #765D66
#765D66
oklch(50.6% 0.035 354.9)
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 #516C64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.036
- Dim Gray #696969 ΔE 0.037
- Dark Aquamarine #017371 ΔE 0.055
- Deep Turquoise #017374 ΔE 0.055
- Battleship Gray #6C757D ΔE 0.060
- Dark Aqua #05696B ΔE 0.060
- Bluegreen #017A79 ΔE 0.061
- Deep Aqua #08787F ΔE 0.061
Use #516C64 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.