#515E6B
Closest named color: Slate (#516572). oklch(47.6% 0.027 248.4), rgb(81, 94, 107).
Aa
White text reads best on this color (6.63:1).
About this color
#515E6B is a medium-dark close to neutral grey. In OKLCH its lightness is 48%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.021 away. White text reads best on it, at 6.63:1.
| Hue family | Neutrals |
| Lightness | medium-dark (48%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #515E6B |
| RGB | rgb(81, 94, 107) |
| HSL | hsl(210, 14%, 37%) |
| OKLCH | oklch(47.6% 0.027 248.4) |
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 #515E6B | 6.63:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #515E6B | 3.16:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #515E6B text on white | 6.63:1 | AA | Lc 82.8 | Fine for body text |
| #515E6B text on black | 3.16:1 | AA large text | Lc -19.1 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D5DADE
oklch(88.6% 0.008 241.7)
-
Step 300
300
#BAC1C9
oklch(80.8% 0.014 251.6)
-
Step 400
400
#97A2AD
oklch(70.7% 0.02 248.1)
-
Step 500
500
#7D8B99
oklch(63% 0.027 248.3)
-
Step 600
600
#677584
oklch(55.6% 0.029 250.2)
-
Step 700
700 (this color)
#515E6B
oklch(47.6% 0.027 248.4)
-
Step 800
800
#46505B
oklch(42.7% 0.022 250.8)
-
Step 900
900
#3B434A
oklch(37.8% 0.016 244.6)
-
Step 950
950
#22272C
oklch(27% 0.012 248.3)
#515E6B 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) | #595E6C | 0.012 |
| Deuteranopia (no green cones) | #565B6B | 0.011 |
| Tritanopia (no blue cones) | #4A6162 | 0.022 |
| Achromatopsia (no color) | #5C5C5C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #515E6B
#515E6B
oklch(47.6% 0.027 248.4)
- #675A4D
#675A4D
oklch(47.6% 0.026 67.1)
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 #515E6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.021
- Dusty Grape #545775 ΔE 0.031
- YInMn Blue #415A77 ΔE 0.034
- Dim Gray #696969 ΔE 0.052
- Dusk #4E5481 ΔE 0.054
- Denim #3B638C ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.066
- Dark Aqua #05696B ΔE 0.066
Use #515E6B 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.