#556E75
Closest named color: Slate (#516572). oklch(52.1% 0.031 216.7), rgb(85, 110, 117).
Aa
White text reads best on this color (5.42:1).
About this color
#556E75 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.031 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 5.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #556E75 |
| RGB | rgb(85, 110, 117) |
| HSL | hsl(193, 16%, 40%) |
| OKLCH | oklch(52.1% 0.031 216.7) |
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 #556E75 | 5.42:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #556E75 | 3.87:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #556E75 text on white | 5.42:1 | AA | Lc 77.0 | Fine for body text |
| #556E75 text on black | 3.87:1 | AA large text | Lc -24.7 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EBEC
oklch(93.7% 0.005 214.3)
-
Step 200
200
#D3DBDD
oklch(88.6% 0.009 214.3)
-
Step 300
300
#B6C3C7
oklch(80.8% 0.015 218.1)
-
Step 400
400
#90A5AA
oklch(70.7% 0.025 213.7)
-
Step 500
500
#758F96
oklch(63.2% 0.031 215.9)
-
Step 600
600
#5D7980
oklch(55.7% 0.034 214.7)
-
Step 700
700 (this color)
#556E75
oklch(52.1% 0.031 216.7)
-
Step 800
800
#3F5358
oklch(42.7% 0.026 214.7)
-
Step 900
900
#364449
oklch(37.6% 0.02 221.6)
-
Step 950
950
#20282A
oklch(27% 0.012 214.5)
#556E75 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) | #696C75 | 0.028 |
| Deuteranopia (no green cones) | #646875 | 0.026 |
| Tritanopia (no blue cones) | #4B7170 | 0.019 |
| Achromatopsia (no color) | #6A6A6A | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556E75
#556E75
oklch(52.1% 0.031 216.7)
- #7A635D
#7A635D
oklch(52.1% 0.031 35)
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 #556E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Dim Gray #696969 ΔE 0.031
- Metallic Blue #4F738E ΔE 0.038
- Battleship Gray #6C757D ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.056
- Grey Blue #647D8E ΔE 0.057
- Deep Aqua #08787F ΔE 0.057
- Dull Blue #49759C ΔE 0.059
Use #556E75 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.