#51645E
Closest named color: Slate (#516572). oklch(48.6% 0.025 174.1), rgb(81, 100, 94).
Aa
White text reads best on this color (6.29:1).
About this color
#51645E is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.032 away. White text reads best on it, at 6.29:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #51645E |
| RGB | rgb(81, 100, 94) |
| HSL | hsl(161, 10%, 35%) |
| OKLCH | oklch(48.6% 0.025 174.1) |
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 #51645E | 6.29:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #51645E | 3.33:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #51645E text on white | 6.29:1 | AA | Lc 81.4 | Fine for body text |
| #51645E text on black | 3.33:1 | AA large text | Lc -20.5 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EBE9
oklch(93.7% 0.004 157.2)
-
Step 200
200
#D5DBD9
oklch(88.6% 0.007 174.4)
-
Step 300
300
#B9C3C0
oklch(80.9% 0.012 176.2)
-
Step 400
400
#95A5A0
oklch(70.8% 0.019 175.1)
-
Step 500
500
#7B8F88
oklch(63.2% 0.025 172.4)
-
Step 600
600
#647972
oklch(55.7% 0.027 173.1)
-
Step 700
700 (this color)
#51645E
oklch(48.6% 0.025 174.1)
-
Step 800
800
#44534E
oklch(42.8% 0.021 173.1)
-
Step 900
900
#394441
oklch(37.6% 0.015 177.2)
-
Step 950
950
#222826
oklch(27% 0.009 173.5)
#51645E 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) | #63615E | 0.027 |
| Deuteranopia (no green cones) | #5F5F5E | 0.024 |
| Tritanopia (no blue cones) | #4D6462 | 0.008 |
| Achromatopsia (no color) | #606060 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51645E
#51645E
oklch(48.6% 0.025 174.1)
- #6B5A60
#6B5A60
oklch(48.6% 0.024 354.8)
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 #51645E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.032
- Dim Gray #696969 ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.055
- Dark Aqua #05696B ΔE 0.059
- YInMn Blue #415A77 ΔE 0.063
- Dusty Grape #545775 ΔE 0.063
- Dark Aquamarine #017371 ΔE 0.065
- Deep Turquoise #017374 ΔE 0.066
Use #51645E 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.