#556B71
Closest named color: Slate (#516572). oklch(51.2% 0.028 216.2), rgb(85, 107, 113).
Aa
White text reads best on this color (5.63:1).
About this color
#556B71 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.020 away. White text reads best on it, at 5.63:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #556B71 |
| RGB | rgb(85, 107, 113) |
| HSL | hsl(193, 14%, 39%) |
| OKLCH | oklch(51.2% 0.028 216.2) |
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 #556B71 | 5.63:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #556B71 | 3.72:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #556B71 text on white | 5.63:1 | AA | Lc 78.2 | Fine for body text |
| #556B71 text on black | 3.72:1 | AA large text | Lc -23.6 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEB
oklch(93.5% 0.004 219.5)
-
Step 200
200
#D4DADC
oklch(88.4% 0.007 219.6)
-
Step 300
300
#B7C3C6
oklch(80.9% 0.014 214.4)
-
Step 400
400
#92A4A9
oklch(70.6% 0.022 216.3)
-
Step 500
500
#778E94
oklch(63.1% 0.028 215.3)
-
Step 600
600
#60787F
oklch(55.6% 0.03 217.4)
-
Step 700
700 (this color)
#556B71
oklch(51.2% 0.028 216.2)
-
Step 800
800
#415257
oklch(42.6% 0.023 217.6)
-
Step 900
900
#374448
oklch(37.7% 0.018 218.4)
-
Step 950
950
#20282A
oklch(27% 0.012 214.5)
#556B71 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) | #676971 | 0.026 |
| Deuteranopia (no green cones) | #626671 | 0.023 |
| Tritanopia (no blue cones) | #4D6D6D | 0.015 |
| Achromatopsia (no color) | #676767 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556B71
#556B71
oklch(51.2% 0.028 216.2)
- #76615C
#76615C
oklch(51.2% 0.028 33.6)
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 #556B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.020
- Dim Gray #696969 ΔE 0.029
- Metallic Blue #4F738E ΔE 0.045
- Battleship Gray #6C757D ΔE 0.048
- Deep Turquoise #017374 ΔE 0.061
- Deep Aqua #08787F ΔE 0.061
- Dark Aquamarine #017371 ΔE 0.062
- Dusty Grape #545775 ΔE 0.064
Use #556B71 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.