#556D75
Closest named color: Slate (#516572). oklch(51.8% 0.031 220.2), rgb(85, 109, 117).
Aa
White text reads best on this color (5.48:1).
About this color
#556D75 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.031 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 5.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.83:1 |
| White text | 5.48:1 |
Values
| HEX | #556D75 |
| RGB | rgb(85, 109, 117) |
| HSL | hsl(195, 16%, 40%) |
| OKLCH | oklch(51.8% 0.031 220.2) |
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 #556D75 | 5.48:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #556D75 | 3.83:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #556D75 text on white | 5.48:1 | AA | Lc 77.4 | Fine for body text |
| #556D75 text on black | 3.83:1 | AA large text | Lc -24.4 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D3DADD
oklch(88.4% 0.009 225.1)
-
Step 300
300
#B7C3C7
oklch(80.9% 0.014 219.6)
-
Step 400
400
#91A4AB
oklch(70.6% 0.024 221.9)
-
Step 500
500
#768E96
oklch(63.1% 0.03 220)
-
Step 600
600
#5E7881
oklch(55.5% 0.033 221)
-
Step 700
700 (this color)
#556D75
oklch(51.8% 0.031 220.2)
-
Step 800
800
#405359
oklch(42.9% 0.026 219.1)
-
Step 900
900
#364449
oklch(37.6% 0.02 221.6)
-
Step 950
950
#20282B
oklch(27% 0.013 222.5)
#556D75 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) | #686B75 | 0.027 |
| Deuteranopia (no green cones) | #636775 | 0.025 |
| Tritanopia (no blue cones) | #4B706F | 0.020 |
| Achromatopsia (no color) | #696969 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556D75
#556D75
oklch(51.8% 0.031 220.2)
- #79635B
#79635B
oklch(51.9% 0.031 41)
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 #556D75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Dim Gray #696969 ΔE 0.031
- Metallic Blue #4F738E ΔE 0.038
- Battleship Gray #6C757D ΔE 0.043
- Battleship Grey #6B7C85 ΔE 0.058
- Deep Aqua #08787F ΔE 0.059
- Grey Blue #647D8E ΔE 0.059
- Dull Blue #49759C ΔE 0.060
Use #556D75 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.