#436B66
Closest named color: Slate (#516572). oklch(49.7% 0.046 185.9), rgb(67, 107, 102).
Aa
White text reads best on this color (5.94:1).
About this color
#436B66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.046 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.036 away. White text reads best on it, at 5.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #436B66 |
| RGB | rgb(67, 107, 102) |
| HSL | hsl(173, 23%, 34%) |
| OKLCH | oklch(49.7% 0.046 185.9) |
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 #436B66 | 5.94:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #436B66 | 3.53:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #436B66 text on white | 5.94:1 | AA | Lc 79.7 | Fine for body text |
| #436B66 text on black | 3.53:1 | AA large text | Lc -22.2 | 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
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D1DCDA
oklch(88.6% 0.012 184)
-
Step 300
300
#B2C6C3
oklch(81.1% 0.022 185.9)
-
Step 400
400
#88A8A4
oklch(70.6% 0.036 187.1)
-
Step 500
500
#6A938D
oklch(63.1% 0.046 184.9)
-
Step 600
600
#517D77
oklch(55.6% 0.05 185.1)
-
Step 700
700 (this color)
#436B66
oklch(49.7% 0.046 185.9)
-
Step 800
800
#365652
oklch(42.7% 0.038 186)
-
Step 900
900
#2F4744
oklch(37.7% 0.03 186.3)
-
Step 950
950
#1C2A28
oklch(27.2% 0.019 185.2)
#436B66 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) | #676766 | 0.049 |
| Deuteranopia (no green cones) | #606267 | 0.046 |
| Tritanopia (no blue cones) | #356D69 | 0.014 |
| Achromatopsia (no color) | #646464 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436B66
#436B66
oklch(49.7% 0.046 185.9)
- #7A585E
#7A585E
oklch(49.8% 0.046 7.1)
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 #436B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.036
- Dark Aquamarine #017371 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.042
- Dark Aqua #05696B ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.050
- Deep Aqua #08787F ΔE 0.052
- Dim Gray #696969 ΔE 0.052
- Bluegreen #017A79 ΔE 0.052
Use #436B66 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.