#515E51
Closest named color: Slate (#516572). oklch(46.7% 0.026 145.1), rgb(81, 94, 81).
Aa
White text reads best on this color (6.84:1).
About this color
#515E51 is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.026. 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 6.84:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #515E51 |
| RGB | rgb(81, 94, 81) |
| HSL | hsl(120, 7%, 34%) |
| OKLCH | oklch(46.7% 0.026 145.1) |
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 #515E51 | 6.84:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #515E51 | 3.06:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #515E51 text on white | 6.84:1 | AA | Lc 83.6 | Fine for body text |
| #515E51 text on black | 3.06:1 | AA large text | Lc -18.3 | 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
#99A499
oklch(70.7% 0.02 145.4)
-
Step 500
500
#808E80
oklch(63.1% 0.026 145.3)
-
Step 600
600
#697869
oklch(55.6% 0.029 145.2)
-
Step 700
700 (this color)
#515E51
oklch(46.7% 0.026 145.1)
-
Step 800
800
#485248
oklch(42.6% 0.021 145.2)
-
Step 900
900
#3C443C
oklch(37.7% 0.017 145.2)
-
Step 950
950
#232823
oklch(27% 0.012 145.2)
#515E51 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) | #5F5B50 | 0.022 |
| Deuteranopia (no green cones) | #5C5A52 | 0.020 |
| Tritanopia (no blue cones) | #505D5A | 0.016 |
| Achromatopsia (no color) | #5B5B5B | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515E51
#515E51
oklch(46.7% 0.026 145.1)
- #625562
#625562
oklch(46.7% 0.026 326)
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 #515E51, 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 0.052
- Dim Gray #696969 ΔE 0.060
- Dark Aqua #05696B ΔE 0.067
- Dark Moss Green #606C38 ΔE 0.068
- Camo Green #526525 ΔE 0.069
- Pine #2B5D34 ΔE 0.069
- YInMn Blue #415A77 ΔE 0.069
Use #515E51 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.