#51696C
Closest named color: Slate (#516572). oklch(50.3% 0.029 205.7), rgb(81, 105, 108).
Aa
White text reads best on this color (5.85:1).
About this color
#51696C is a medium-dark close to neutral grey. In OKLCH its lightness is 50%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.018 away. White text reads best on it, at 5.85:1.
| Hue family | Neutrals |
| Lightness | medium-dark (50%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #51696C |
| RGB | rgb(81, 105, 108) |
| HSL | hsl(187, 14%, 37%) |
| OKLCH | oklch(50.3% 0.029 205.7) |
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 #51696C | 5.85:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #51696C | 3.58:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #51696C text on white | 5.85:1 | AA | Lc 79.3 | Fine for body text |
| #51696C text on black | 3.58:1 | AA large text | Lc -22.5 | 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
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D4DBDB
oklch(88.6% 0.008 197)
-
Step 300
300
#B7C3C5
oklch(80.9% 0.014 208.8)
-
Step 400
400
#91A5A7
oklch(70.7% 0.023 204)
-
Step 500
500
#768F92
oklch(63.2% 0.029 205.4)
-
Step 600
600
#5E797C
oklch(55.6% 0.032 204.7)
-
Step 700
700 (this color)
#51696C
oklch(50.3% 0.029 205.7)
-
Step 800
800
#405355
oklch(42.7% 0.024 204.3)
-
Step 900
900
#364546
oklch(37.8% 0.019 201.4)
-
Step 950
950
#202829
oklch(27% 0.011 205.8)
#51696C 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) | #65676C | 0.028 |
| Deuteranopia (no green cones) | #60636C | 0.026 |
| Tritanopia (no blue cones) | #486B6A | 0.013 |
| Achromatopsia (no color) | #656565 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51696C
#51696C
oklch(50.3% 0.029 205.7)
- #745E5B
#745E5B
oklch(50.3% 0.029 27.2)
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 #51696C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.018
- Dim Gray #696969 ΔE 0.034
- Metallic Blue #4F738E ΔE 0.054
- Deep Turquoise #017374 ΔE 0.057
- Battleship Gray #6C757D ΔE 0.058
- Dark Aquamarine #017371 ΔE 0.058
- Dark Aqua #05696B ΔE 0.059
- YInMn Blue #415A77 ΔE 0.060
Use #51696C 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.