#516663
Closest named color: Slate (#516572). oklch(49.2% 0.026 185.7), rgb(81, 102, 99).
Aa
White text reads best on this color (6.12:1).
About this color
#516663 is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.026 away. White text reads best on it, at 6.12:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.43:1 |
| White text | 6.12:1 |
Values
| HEX | #516663 |
| RGB | rgb(81, 102, 99) |
| HSL | hsl(171, 11%, 36%) |
| OKLCH | oklch(49.2% 0.026 185.7) |
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 #516663 | 6.12:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #516663 | 3.43:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #516663 text on white | 6.12:1 | AA | Lc 80.6 | Fine for body text |
| #516663 text on black | 3.43:1 | AA large text | Lc -21.3 | 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
#D4DBDA
oklch(88.6% 0.008 186.9)
-
Step 300
300
#B8C3C2
oklch(80.8% 0.012 190.4)
-
Step 400
400
#93A5A2
oklch(70.7% 0.021 184.7)
-
Step 500
500
#798F8C
oklch(63.2% 0.026 186.5)
-
Step 600
600
#627976
oklch(55.7% 0.027 186.7)
-
Step 700
700 (this color)
#516663
oklch(49.2% 0.026 185.7)
-
Step 800
800
#425351
oklch(42.7% 0.021 187.6)
-
Step 900
900
#384543
oklch(37.8% 0.017 185.1)
-
Step 950
950
#212827
oklch(27% 0.01 186.1)
#516663 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) | #646463 | 0.028 |
| Deuteranopia (no green cones) | #606163 | 0.025 |
| Tritanopia (no blue cones) | #4B6765 | 0.008 |
| Achromatopsia (no color) | #626262 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #516663
#516663
oklch(49.2% 0.026 185.7)
- #6E5B5F
#6E5B5F
oklch(49.1% 0.025 3.9)
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 #516663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.026
- Dim Gray #696969 ΔE 0.038
- Dark Aqua #05696B ΔE 0.058
- Dark Green Blue #1F6357 ΔE 0.059
- YInMn Blue #415A77 ΔE 0.061
- Dark Aquamarine #017371 ΔE 0.061
- Deep Turquoise #017374 ΔE 0.062
- Dusty Grape #545775 ΔE 0.062
Use #516663 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.