#366F64
Closest named color: Dark Aquamarine (#017371). oklch(50% 0.063 179.4), rgb(54, 111, 100).
Aa
White text reads best on this color (5.80:1).
About this color
#366F64 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.063 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.029 away. White text reads best on it, at 5.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.61:1 |
| White text | 5.80:1 |
Values
| HEX | #366F64 |
| RGB | rgb(54, 111, 100) |
| HSL | hsl(168, 35%, 32%) |
| OKLCH | oklch(50% 0.063 179.4) |
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 #366F64 | 5.80:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #366F64 | 3.61:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #366F64 text on white | 5.80:1 | AA | Lc 78.9 | Fine for body text |
| #366F64 text on black | 3.61:1 | AA large text | Lc -22.9 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDD9
oklch(88.5% 0.017 178.2)
-
Step 300
300
#ACC7C1
oklch(80.8% 0.03 180.6)
-
Step 400
400
#80ABA1
oklch(70.7% 0.049 178.9)
-
Step 500
500
#5E968A
oklch(63.1% 0.062 179.1)
-
Step 600
600
#428074
oklch(55.5% 0.067 179.6)
-
Step 700
700 (this color)
#366F64
oklch(50% 0.063 179.4)
-
Step 800
800
#2C5850
oklch(42.6% 0.051 180.5)
-
Step 900
900
#284942
oklch(37.8% 0.041 178.8)
-
Step 950
950
#182B27
oklch(27.1% 0.026 179.4)
#366F64 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) | #6B6964 | 0.067 |
| Deuteranopia (no green cones) | #626265 | 0.065 |
| Tritanopia (no blue cones) | #1C716C | 0.019 |
| Achromatopsia (no color) | #656565 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366F64
#366F64
oklch(50% 0.063 179.4)
- #815462
#815462
oklch(50% 0.063 359.4)
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 #366F64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.029
- Deep Turquoise #017374 ΔE 0.031
- Dark Aqua #05696B ΔE 0.038
- Bluegreen #017A79 ΔE 0.041
- Deep Aqua #08787F ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.046
- Slate #516572 ΔE 0.053
- Teal #008080 ΔE 0.057
Use #366F64 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.