#51574E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.8% 0.016 135), rgb(81, 87, 78).
Aa
White text reads best on this color (7.43:1).
About this color
#51574E is a dark close to neutral grey. In OKLCH its lightness is 45%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.056 away. White text reads best on it, at 7.43:1.
| Hue family | Neutrals |
| Lightness | dark (45%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.82:1 |
| White text | 7.43:1 |
Values
| HEX | #51574E |
| RGB | rgb(81, 87, 78) |
| HSL | hsl(100, 5%, 32%) |
| OKLCH | oklch(44.8% 0.016 135) |
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 #51574E | 7.43:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #51574E | 2.82:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #51574E text on white | 7.43:1 | AAA | Lc 85.9 | Fine for body text |
| #51574E text on black | 2.82:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E9EAE8
oklch(93.6% 0.003 128.5)
-
Step 200
200
#D7DAD6
oklch(88.5% 0.006 137.8)
-
Step 300
300
#BEC2BC
oklch(80.9% 0.009 134.9)
-
Step 400
400
#9DA399
oklch(70.8% 0.016 132.5)
-
Step 500
500
#848C81
oklch(63% 0.019 137.1)
-
Step 600
600
#6E766A
oklch(55.5% 0.021 135)
-
Step 700
700
#5C6358
oklch(49% 0.019 134)
-
Step 800
800 (this color)
#51574E
oklch(44.8% 0.016 135)
-
Step 900
900
#3F433C
oklch(37.7% 0.013 131.6)
-
Step 950
950
#252723
oklch(26.9% 0.008 128.8)
#51574E 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) | #58554E | 0.012 |
| Deuteranopia (no green cones) | #57554E | 0.011 |
| Tritanopia (no blue cones) | #515654 | 0.011 |
| Achromatopsia (no color) | #555555 | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51574E
#51574E
oklch(44.8% 0.016 135)
- #58525B
#58525B
oklch(44.8% 0.016 314.6)
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 #51574E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.060
- Slate #516572 ΔE 0.061
- Dusty Grape #545775 ΔE 0.065
- YInMn Blue #415A77 ΔE 0.067
- Pine #2B5D34 ΔE 0.072
- Petrol #005F6A ΔE 0.074
- Dim Gray #696969 ΔE 0.074
Use #51574E 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.