#51655E
Closest named color: Slate (#516572). oklch(48.8% 0.027 171.9), rgb(81, 101, 94).
Aa
White text reads best on this color (6.22:1).
About this color
#51655E is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.033 away. White text reads best on it, at 6.22:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #51655E |
| RGB | rgb(81, 101, 94) |
| HSL | hsl(159, 11%, 36%) |
| OKLCH | oklch(48.8% 0.027 171.9) |
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 #51655E | 6.22:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #51655E | 3.37:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #51655E text on white | 6.22:1 | AA | Lc 81.0 | Fine for body text |
| #51655E text on black | 3.37:1 | AA large text | Lc -20.8 | 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
#D5DBD8
oklch(88.6% 0.008 164.9)
-
Step 300
300
#B9C3BF
oklch(80.8% 0.012 170.2)
-
Step 400
400
#94A59F
oklch(70.7% 0.021 172.5)
-
Step 500
500
#7A8F87
oklch(63.1% 0.027 170.4)
-
Step 600
600
#637971
oklch(55.6% 0.029 171.2)
-
Step 700
700 (this color)
#51655E
oklch(48.8% 0.027 171.9)
-
Step 800
800
#43534D
oklch(42.7% 0.022 170.5)
-
Step 900
900
#394540
oklch(37.8% 0.018 168.3)
-
Step 950
950
#212826
oklch(26.9% 0.011 176.4)
#51655E 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) | #64625E | 0.028 |
| Deuteranopia (no green cones) | #60605E | 0.025 |
| Tritanopia (no blue cones) | #4D6563 | 0.009 |
| Achromatopsia (no color) | #616161 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51655E
#51655E
oklch(48.8% 0.027 171.9)
- #6C5A61
#6C5A61
oklch(48.8% 0.026 352.7)
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 #51655E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.033
- Dim Gray #696969 ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.056
- Dark Aqua #05696B ΔE 0.058
- Dark Aquamarine #017371 ΔE 0.063
- Deep Turquoise #017374 ΔE 0.064
- YInMn Blue #415A77 ΔE 0.065
- Dusty Grape #545775 ΔE 0.066
Use #51655E 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.