#516666
Closest named color: Slate (#516572). oklch(49.3% 0.025 196.4), rgb(81, 102, 102).
Aa
White text reads best on this color (6.10:1).
About this color
#516666 is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.021 away. White text reads best on it, at 6.10:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.44:1 |
| White text | 6.10:1 |
Values
| HEX | #516666 |
| RGB | rgb(81, 102, 102) |
| HSL | hsl(180, 11%, 36%) |
| OKLCH | oklch(49.3% 0.025 196.4) |
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 #516666 | 6.10:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #516666 | 3.44:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #516666 text on white | 6.10:1 | AA | Lc 80.5 | Fine for body text |
| #516666 text on black | 3.44:1 | AA large text | Lc -21.4 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEA
oklch(93.5% 0.003 197.1)
-
Step 200
200
#D4DADA
oklch(88.4% 0.007 197)
-
Step 300
300
#B8C3C3
oklch(80.9% 0.012 196.9)
-
Step 400
400
#93A5A4
oklch(70.8% 0.02 192.6)
-
Step 500
500
#798E8E
oklch(63% 0.024 196.6)
-
Step 600
600
#617979
oklch(55.7% 0.028 196.4)
-
Step 700
700 (this color)
#516666
oklch(49.3% 0.025 196.4)
-
Step 800
800
#425353
oklch(42.8% 0.021 196.4)
-
Step 900
900
#384444
oklch(37.6% 0.016 196.5)
-
Step 950
950
#212828
oklch(27% 0.01 196.6)
#516666 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) | #636466 | 0.026 |
| Deuteranopia (no green cones) | #5F6166 | 0.024 |
| Tritanopia (no blue cones) | #4A6766 | 0.009 |
| Achromatopsia (no color) | #626262 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516666
#516666
oklch(49.3% 0.025 196.4)
- #6F5C5C
#6F5C5C
oklch(49.4% 0.025 18)
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 #516666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.021
- Dim Gray #696969 ΔE 0.037
- Dark Aqua #05696B ΔE 0.058
- YInMn Blue #415A77 ΔE 0.058
- Dusty Grape #545775 ΔE 0.059
- Dark Green Blue #1F6357 ΔE 0.061
- Deep Turquoise #017374 ΔE 0.061
- Dark Aquamarine #017371 ΔE 0.061
Use #516666 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.