#515C68
Closest named color: Slate (#516572). oklch(47% 0.024 250.6), rgb(81, 92, 104).
Aa
White text reads best on this color (6.81:1).
About this color
#515C68 is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 6.81:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #515C68 |
| RGB | rgb(81, 92, 104) |
| HSL | hsl(211, 12%, 36%) |
| OKLCH | oklch(47% 0.024 250.6) |
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 #515C68 | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #515C68 | 3.08:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #515C68 text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #515C68 text on black | 3.08:1 | AA large text | Lc -18.4 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6D9DD
oklch(88.4% 0.006 255.5)
-
Step 300
300
#BBC1C8
oklch(80.8% 0.012 252.1)
-
Step 400
400
#98A2AC
oklch(70.7% 0.019 248.1)
-
Step 500
500
#7F8B98
oklch(63.1% 0.024 250.3)
-
Step 600
600
#687582
oklch(55.6% 0.026 248.3)
-
Step 700
700 (this color)
#515C68
oklch(47% 0.024 250.6)
-
Step 800
800
#47505A
oklch(42.7% 0.02 251.1)
-
Step 900
900
#3C424A
oklch(37.7% 0.016 255.6)
-
Step 950
950
#23272B
oklch(27% 0.009 248.2)
#515C68 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) | #585C69 | 0.011 |
| Deuteranopia (no green cones) | #555A68 | 0.008 |
| Tritanopia (no blue cones) | #4B5F60 | 0.021 |
| Achromatopsia (no color) | #5B5B5B | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515C68
#515C68
oklch(47% 0.024 250.6)
- #64594C
#64594C
oklch(47.1% 0.025 71.8)
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 #515C68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Dusty Grape #545775 ΔE 0.030
- YInMn Blue #415A77 ΔE 0.034
- Dusk #4E5481 ΔE 0.054
- Dim Gray #696969 ΔE 0.056
- Denim #3B638C ΔE 0.060
- Petrol #005F6A ΔE 0.066
- Light Navy Blue #2E5A88 ΔE 0.067
Use #515C68 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.