#366D59
Closest named color: Dark Aquamarine (#017371). oklch(49.1% 0.067 167.7), rgb(54, 109, 89).
Aa
White text reads best on this color (6.01:1).
About this color
#366D59 is a medium-dark, muted green. In OKLCH its lightness is 49%, its chroma 0.067 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.039 away. White text reads best on it, at 6.01:1.
| Hue family | Greens |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.067) |
| Temperature | in between |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.48:1 |
| White text | 6.01:1 |
Values
| HEX | #366D59 |
| RGB | rgb(54, 109, 89) |
| HSL | hsl(158, 34%, 32%) |
| OKLCH | oklch(49.1% 0.067 167.7) |
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 #366D59 | 6.01:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #366D59 | 3.48:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #366D59 text on white | 6.01:1 | AA | Lc 79.9 | Fine for body text |
| #366D59 text on black | 3.48:1 | AA large text | Lc -21.9 | 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
#E4ECE8
oklch(93.6% 0.01 164.9)
-
Step 200
200
#CEDDD7
oklch(88.5% 0.018 170)
-
Step 300
300
#ADC8BC
oklch(80.9% 0.034 166.9)
-
Step 400
400
#81AB9A
oklch(70.6% 0.052 168.1)
-
Step 500
500
#609781
oklch(63.1% 0.068 167)
-
Step 600
600
#45816B
oklch(55.6% 0.072 167.9)
-
Step 700
700 (this color)
#366D59
oklch(49.1% 0.067 167.7)
-
Step 800
800
#2E5949
oklch(42.8% 0.056 167.6)
-
Step 900
900
#29493D
oklch(37.7% 0.044 168.1)
-
Step 950
950
#192B24
oklch(27.1% 0.027 167.9)
#366D59 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) | #6B6758 | 0.068 |
| Deuteranopia (no green cones) | #62605A | 0.066 |
| Tritanopia (no blue cones) | #236D67 | 0.025 |
| Achromatopsia (no color) | #636363 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #366D59
#366D59
oklch(49.1% 0.067 167.7)
- #7D5168
#7D5168
oklch(49.1% 0.067 347.2)
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 #366D59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.039
- Dark Aqua #05696B ΔE 0.043
- Deep Turquoise #017374 ΔE 0.043
- Bluegreen #017A79 ΔE 0.053
- Deep Aqua #08787F ΔE 0.059
- Dark Olive Green #556B2F ΔE 0.060
- Dark Moss Green #606C38 ΔE 0.061
Use #366D59 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.