#515C63
Closest named color: Slate (#516572). oklch(46.8% 0.018 235.7), rgb(81, 92, 99).
Aa
White text reads best on this color (6.86:1).
About this color
#515C63 is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 6.86:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.06:1 |
| White text | 6.86:1 |
Values
| HEX | #515C63 |
| RGB | rgb(81, 92, 99) |
| HSL | hsl(203, 10%, 35%) |
| OKLCH | oklch(46.8% 0.018 235.7) |
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 #515C63 | 6.86:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #515C63 | 3.06:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #515C63 text on white | 6.86:1 | AA | Lc 83.7 | Fine for body text |
| #515C63 text on black | 3.06:1 | AA large text | Lc -18.2 | 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 700.
-
Step 50
50
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D6DADC
oklch(88.6% 0.005 228.8)
-
Step 300
300
#BCC2C5
oklch(81% 0.008 228.9)
-
Step 400
400
#99A2A8
oklch(70.7% 0.014 236.7)
-
Step 500
500
#808B93
oklch(63% 0.018 239.3)
-
Step 600
600
#69757D
oklch(55.5% 0.019 237)
-
Step 700
700 (this color)
#515C63
oklch(46.8% 0.018 235.7)
-
Step 800
800
#485056
oklch(42.6% 0.014 240.2)
-
Step 900
900
#3C4347
oklch(37.8% 0.012 232.7)
-
Step 950
950
#23272A
oklch(27% 0.008 240.2)
#515C63 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) | #595C63 | 0.012 |
| Deuteranopia (no green cones) | #565963 | 0.011 |
| Tritanopia (no blue cones) | #4C5E5E | 0.014 |
| Achromatopsia (no color) | #5A5A5A | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515C63
#515C63
oklch(46.8% 0.018 235.7)
- #625851
#625851
oklch(46.8% 0.017 57.3)
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 #515C63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Dusty Grape #545775 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.040
- Dim Gray #696969 ΔE 0.056
- Dusk #4E5481 ΔE 0.062
- Dark Green Blue #1F6357 ΔE 0.064
- Petrol #005F6A ΔE 0.066
- Dark Aqua #05696B ΔE 0.066
Use #515C63 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.