#556571
Closest named color: Slate (#516572). oklch(49.8% 0.027 240.5), rgb(85, 101, 113).
Aa
White text reads best on this color (6.02:1).
About this color
#556571 is a medium-dark close to neutral grey. In OKLCH its lightness is 50%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.006 away. White text reads best on it, at 6.02:1.
| Hue family | Neutrals |
| Lightness | medium-dark (50%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #556571 |
| RGB | rgb(85, 101, 113) |
| HSL | hsl(206, 14%, 39%) |
| OKLCH | oklch(49.8% 0.027 240.5) |
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 #556571 | 6.02:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #556571 | 3.48:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #556571 text on white | 6.02:1 | AA | Lc 80.1 | Fine for body text |
| #556571 text on black | 3.48:1 | AA large text | Lc -21.7 | 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
#F4F5F6
oklch(97% 0.002 247.8)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D5DADD
oklch(88.5% 0.007 233.7)
-
Step 300
300
#B9C2C8
oklch(80.9% 0.013 236.7)
-
Step 400
400
#95A3AD
oklch(70.8% 0.022 238.8)
-
Step 500
500
#7B8C99
oklch(63.1% 0.028 240.9)
-
Step 600
600
#647683
oklch(55.6% 0.029 239.5)
-
Step 700
700 (this color)
#556571
oklch(49.8% 0.027 240.5)
-
Step 800
800
#44515A
oklch(42.7% 0.022 238.3)
-
Step 900
900
#39434A
oklch(37.7% 0.018 238.5)
-
Step 950
950
#22272B
oklch(26.9% 0.01 242.1)
#556571 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) | #606572 | 0.016 |
| Deuteranopia (no green cones) | #5C6171 | 0.015 |
| Tritanopia (no blue cones) | #4D6869 | 0.021 |
| Achromatopsia (no color) | #636363 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556571
#556571
oklch(49.8% 0.027 240.5)
- #6F5F53
#6F5F53
oklch(49.7% 0.028 58.9)
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 #556571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.006
- Dim Gray #696969 ΔE 0.036
- Dusty Grape #545775 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.048
- Metallic Blue #4F738E ΔE 0.052
- Denim #3B638C ΔE 0.054
- Battleship Gray #6C757D ΔE 0.061
- Dusk #4E5481 ΔE 0.066
Use #556571 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.