#505F55
Closest named color: Slate (#516572). oklch(47% 0.024 156.2), rgb(80, 95, 85).
Aa
White text reads best on this color (6.75:1).
About this color
#505F55 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 0.045 away. White text reads best on it, at 6.75:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #505F55 |
| RGB | rgb(80, 95, 85) |
| HSL | hsl(140, 9%, 34%) |
| OKLCH | oklch(47% 0.024 156.2) |
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 #505F55 | 6.75:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #505F55 | 3.10:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #505F55 text on white | 6.75:1 | AA | Lc 83.3 | Fine for body text |
| #505F55 text on black | 3.10:1 | AA large text | Lc -18.6 | 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
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D6DAD7
oklch(88.4% 0.006 153.8)
-
Step 300
300
#BBC3BD
oklch(80.9% 0.012 153.6)
-
Step 400
400
#98A49C
oklch(70.7% 0.018 156.7)
-
Step 500
500
#7E8E83
oklch(63.1% 0.025 155.6)
-
Step 600
600
#67786D
oklch(55.5% 0.026 157.1)
-
Step 700
700 (this color)
#505F55
oklch(47% 0.024 156.2)
-
Step 800
800
#46524A
oklch(42.5% 0.02 156.3)
-
Step 900
900
#3B443E
oklch(37.6% 0.016 156.4)
-
Step 950
950
#232824
oklch(27% 0.01 151.4)
#505F55 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) | #5F5C55 | 0.024 |
| Deuteranopia (no green cones) | #5C5B56 | 0.021 |
| Tritanopia (no blue cones) | #4E5F5C | 0.011 |
| Achromatopsia (no color) | #5B5B5B | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #505F55
#505F55
oklch(47% 0.024 156.2)
- #645660
#645660
oklch(47% 0.024 336.2)
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 #505F55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.051
- Dim Gray #696969 ΔE 0.057
- Dark Aqua #05696B ΔE 0.063
- YInMn Blue #415A77 ΔE 0.065
- Dusty Grape #545775 ΔE 0.066
- Petrol #005F6A ΔE 0.069
- Dark Moss Green #606C38 ΔE 0.070
Use #505F55 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.