#555B4F
Closest named color: Slate (#516572). oklch(46.2% 0.02 129), rgb(85, 91, 79).
Aa
White text reads best on this color (7.01:1).
About this color
#555B4F is a medium-dark close to neutral grey. In OKLCH its lightness is 46%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.054 away. White text reads best on it, at 7.01:1.
| Hue family | Neutrals |
| Lightness | medium-dark (46%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #555B4F |
| RGB | rgb(85, 91, 79) |
| HSL | hsl(90, 7%, 33%) |
| OKLCH | oklch(46.2% 0.02 129) |
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 #555B4F | 7.01:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #555B4F | 2.99:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #555B4F text on white | 7.01:1 | AAA | Lc 84.3 | Fine for body text |
| #555B4F text on black | 2.99:1 | Fails | Lc -17.7 | 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
#E9EAE8
oklch(93.6% 0.003 128.5)
-
Step 200
200
#D8DAD6
oklch(88.6% 0.006 128.5)
-
Step 300
300
#BEC2BB
oklch(80.9% 0.011 131.4)
-
Step 400
400
#9DA398
oklch(70.7% 0.017 130.5)
-
Step 500
500
#868C7F
oklch(63.1% 0.02 127.3)
-
Step 600
600
#6F7669
oklch(55.6% 0.021 130.4)
-
Step 700
700 (this color)
#555B4F
oklch(46.2% 0.02 129)
-
Step 800
800
#4C5147
oklch(42.7% 0.017 128.9)
-
Step 900
900
#3F433C
oklch(37.7% 0.013 131.6)
-
Step 950
950
#252723
oklch(26.9% 0.008 128.8)
#555B4F 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) | #5C594E | 0.012 |
| Deuteranopia (no green cones) | #5B594F | 0.011 |
| Tritanopia (no blue cones) | #565A58 | 0.016 |
| Achromatopsia (no color) | #595959 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555B4F
#555B4F
oklch(46.2% 0.02 129)
- #5C5662
#5C5662
oklch(46.3% 0.021 308)
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 #555B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.054
- Dark Green Blue #1F6357 ΔE 0.060
- Dim Gray #696969 ΔE 0.062
- Dusty Grape #545775 ΔE 0.067
- Dark Slate Gray #2F4F4F ΔE 0.069
- YInMn Blue #415A77 ΔE 0.070
- Dark Moss Green #606C38 ΔE 0.073
- Camo Green #526525 ΔE 0.073
Use #555B4F 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.