#515D51
Closest named color: Slate (#516572). oklch(46.4% 0.024 145.2), rgb(81, 93, 81).
Aa
White text reads best on this color (6.92:1).
About this color
#515D51 is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.051 away. White text reads best on it, at 6.92:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.03:1 |
| White text | 6.92:1 |
Values
| HEX | #515D51 |
| RGB | rgb(81, 93, 81) |
| HSL | hsl(120, 7%, 34%) |
| OKLCH | oklch(46.4% 0.024 145.2) |
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 #515D51 | 6.92:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #515D51 | 3.03:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #515D51 text on white | 6.92:1 | AA | Lc 84.0 | Fine for body text |
| #515D51 text on black | 3.03:1 | AA large text | Lc -18.0 | 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
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E8EAE8
oklch(93.5% 0.003 145.5)
-
Step 200
200
#D6DAD6
oklch(88.4% 0.007 145.5)
-
Step 300
300
#BCC3BC
oklch(81% 0.012 145.5)
-
Step 400
400
#9AA49A
oklch(70.8% 0.018 145.4)
-
Step 500
500
#818E81
oklch(63.2% 0.024 145.3)
-
Step 600
600
#6A786A
oklch(55.7% 0.027 145.2)
-
Step 700
700 (this color)
#515D51
oklch(46.4% 0.024 145.2)
-
Step 800
800
#485248
oklch(42.6% 0.021 145.2)
-
Step 900
900
#3D443D
oklch(37.8% 0.015 145.3)
-
Step 950
950
#242823
oklch(27.1% 0.011 139.4)
#515D51 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) | #5E5B50 | 0.020 |
| Deuteranopia (no green cones) | #5B5952 | 0.019 |
| Tritanopia (no blue cones) | #505C5A | 0.016 |
| Achromatopsia (no color) | #5A5A5A | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515D51
#515D51
oklch(46.4% 0.024 145.2)
- #605561
#605561
oklch(46.4% 0.024 323.4)
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 #515D51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.051
- Dark Green Blue #1F6357 ΔE 0.053
- Dim Gray #696969 ΔE 0.062
- Dark Aqua #05696B ΔE 0.068
- Dark Slate Gray #2F4F4F ΔE 0.068
- YInMn Blue #415A77 ΔE 0.068
- Dusty Grape #545775 ΔE 0.068
- Pine #2B5D34 ΔE 0.070
Use #515D51 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.