#51665E
Closest named color: Slate (#516572). oklch(49% 0.028 169.9), rgb(81, 102, 94).
Aa
White text reads best on this color (6.15:1).
About this color
#51665E is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.034 away. White text reads best on it, at 6.15:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.41:1 |
| White text | 6.15:1 |
Values
| HEX | #51665E |
| RGB | rgb(81, 102, 94) |
| HSL | hsl(157, 11%, 36%) |
| OKLCH | oklch(49% 0.028 169.9) |
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 #51665E | 6.15:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #51665E | 3.41:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #51665E text on white | 6.15:1 | AA | Lc 80.7 | Fine for body text |
| #51665E text on black | 3.41:1 | AA large text | Lc -21.1 | 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
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B8C4BF
oklch(81% 0.015 169.1)
-
Step 400
400
#94A59E
oklch(70.6% 0.022 169.1)
-
Step 500
500
#798F87
oklch(63% 0.028 171.4)
-
Step 600
600
#627970
oklch(55.5% 0.03 169.5)
-
Step 700
700 (this color)
#51665E
oklch(49% 0.028 169.9)
-
Step 800
800
#43534D
oklch(42.7% 0.022 170.5)
-
Step 900
900
#384540
oklch(37.7% 0.019 170)
-
Step 950
950
#212825
oklch(26.9% 0.011 167.8)
#51665E 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) | #65635E | 0.030 |
| Deuteranopia (no green cones) | #61605F | 0.029 |
| Tritanopia (no blue cones) | #4C6664 | 0.011 |
| Achromatopsia (no color) | #616161 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51665E
#51665E
oklch(49% 0.028 169.9)
- #6E5A63
#6E5A63
oklch(49% 0.029 349.4)
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 #51665E, 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 0.041
- Dark Green Blue #1F6357 ΔE 0.056
- Dark Aqua #05696B ΔE 0.058
- Dark Aquamarine #017371 ΔE 0.062
- Deep Turquoise #017374 ΔE 0.063
- Dark Moss Green #606C38 ΔE 0.064
- YInMn Blue #415A77 ΔE 0.067
Use #51665E 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.