#515D6B
Closest named color: Slate (#516572). oklch(47.3% 0.027 252.4), rgb(81, 93, 107).
Aa
White text reads best on this color (6.71:1).
About this color
#515D6B is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.024 away. White text reads best on it, at 6.71:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.12:1 |
| White text | 6.71:1 |
Values
| HEX | #515D6B |
| RGB | rgb(81, 93, 107) |
| HSL | hsl(212, 14%, 37%) |
| OKLCH | oklch(47.3% 0.027 252.4) |
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 #515D6B | 6.71:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #515D6B | 3.12:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #515D6B text on white | 6.71:1 | AA | Lc 83.1 | Fine for body text |
| #515D6B text on black | 3.12:1 | AA large text | Lc -18.8 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D6D9DE
oklch(88.4% 0.008 260.7)
-
Step 300
300
#BBC1C9
oklch(80.9% 0.013 255.5)
-
Step 400
400
#97A2AE
oklch(70.7% 0.022 250.5)
-
Step 500
500
#7E8B9A
oklch(63.1% 0.027 252)
-
Step 600
600
#677584
oklch(55.6% 0.029 250.2)
-
Step 700
700 (this color)
#515D6B
oklch(47.3% 0.027 252.4)
-
Step 800
800
#46505B
oklch(42.7% 0.022 250.8)
-
Step 900
900
#3B424B
oklch(37.6% 0.018 254.7)
-
Step 950
950
#23272C
oklch(27.1% 0.011 254)
#515D6B 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) | #585D6C | 0.011 |
| Deuteranopia (no green cones) | #555B6B | 0.008 |
| Tritanopia (no blue cones) | #4A6061 | 0.024 |
| Achromatopsia (no color) | #5C5C5C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515D6B
#515D6B
oklch(47.3% 0.027 252.4)
- #655A4B
#655A4B
oklch(47.4% 0.027 75.5)
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 #515D6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.024
- Dusty Grape #545775 ΔE 0.029
- YInMn Blue #415A77 ΔE 0.032
- Dusk #4E5481 ΔE 0.052
- Dim Gray #696969 ΔE 0.055
- Denim #3B638C ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.065
- Dusky Blue #475F94 ΔE 0.066
Use #515D6B 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.