#555D55
Closest named color: Slate (#516572). oklch(46.9% 0.016 145.3), rgb(85, 93, 85).
Aa
White text reads best on this color (6.81:1).
About this color
#555D55 is a medium-dark close to neutral grey. In OKLCH its lightness is 47%, its chroma 0.016. 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 6.81:1.
| Hue family | Neutrals |
| Lightness | medium-dark (47%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #555D55 |
| RGB | rgb(85, 93, 85) |
| HSL | hsl(120, 4%, 35%) |
| OKLCH | oklch(46.9% 0.016 145.3) |
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 #555D55 | 6.81:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #555D55 | 3.08:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #555D55 text on white | 6.81:1 | AA | Lc 83.5 | Fine for body text |
| #555D55 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
#F5F5F5
oklch(97% 0 0)
-
Step 100
100
#E9EAE9
oklch(93.6% 0.002 145.6)
-
Step 200
200
#D7DAD7
oklch(88.5% 0.005 145.5)
-
Step 300
300
#BDC2BD
oklch(80.9% 0.009 145.5)
-
Step 400
400
#9CA39C
oklch(70.8% 0.013 145.4)
-
Step 500
500
#848C84
oklch(63.1% 0.015 145.4)
-
Step 600
600
#6D766D
oklch(55.5% 0.017 145.3)
-
Step 700
700 (this color)
#555D55
oklch(46.9% 0.016 145.3)
-
Step 800
800
#4B514B
oklch(42.8% 0.012 145.4)
-
Step 900
900
#3E433E
oklch(37.6% 0.011 145.4)
-
Step 950
950
#242724
oklch(26.9% 0.007 145.4)
#555D55 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) | #5D5B55 | 0.013 |
| Deuteranopia (no green cones) | #5C5A55 | 0.014 |
| Tritanopia (no blue cones) | #545C5B | 0.011 |
| Achromatopsia (no color) | #5B5B5B | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555D55
#555D55
oklch(46.9% 0.016 145.3)
- #5F575F
#5F575F
oklch(46.7% 0.016 325.8)
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 #555D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.045
- Dim Gray #696969 ΔE 0.055
- Dark Green Blue #1F6357 ΔE 0.059
- Dusty Grape #545775 ΔE 0.061
- YInMn Blue #415A77 ΔE 0.064
- Dark Aqua #05696B ΔE 0.071
- Dark Slate Gray #2F4F4F ΔE 0.072
- Dark Moss Green #606C38 ΔE 0.073
Use #555D55 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.