#366D72
Closest named color: Deep Turquoise (#017374). oklch(49.9% 0.059 203.3), rgb(54, 109, 114).
Aa
White text reads best on this color (5.85:1).
About this color
#366D72 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.059 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.029 away. White text reads best on it, at 5.85:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #366D72 |
| RGB | rgb(54, 109, 114) |
| HSL | hsl(185, 36%, 33%) |
| OKLCH | oklch(49.9% 0.059 203.3) |
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 #366D72 | 5.85:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #366D72 | 3.58:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #366D72 text on white | 5.85:1 | AA | Lc 79.1 | Fine for body text |
| #366D72 text on black | 3.58:1 | AA large text | Lc -22.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CEDCDE
oklch(88.4% 0.015 207.1)
-
Step 300
300
#ACC6C9
oklch(80.8% 0.028 205.1)
-
Step 400
400
#80A9AD
oklch(70.6% 0.045 203.7)
-
Step 500
500
#5E9499
oklch(63.1% 0.058 203.3)
-
Step 600
600
#427E84
oklch(55.5% 0.063 204)
-
Step 700
700 (this color)
#366D72
oklch(49.9% 0.059 203.3)
-
Step 800
800
#2C575B
oklch(42.8% 0.048 203.4)
-
Step 900
900
#28484B
oklch(37.8% 0.038 203.4)
-
Step 950
950
#182A2C
oklch(27% 0.024 204.7)
#366D72 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) | #666972 | 0.059 |
| Deuteranopia (no green cones) | #5C6272 | 0.054 |
| Tritanopia (no blue cones) | #0E716E | 0.028 |
| Achromatopsia (no color) | #656565 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366D72
#366D72
oklch(49.9% 0.059 203.3)
- #815653
#815653
oklch(49.9% 0.058 23.8)
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 #366D72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.030
- Dark Aqua #05696B ΔE 0.034
- Deep Aqua #08787F ΔE 0.037
- Slate #516572 ΔE 0.037
- Bluegreen #017A79 ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.054
- Sea Blue #047495 ΔE 0.055
Use #366D72 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.