#436C73
Closest named color: Slate (#516572). oklch(50.4% 0.047 209.4), rgb(67, 108, 115).
Aa
White text reads best on this color (5.78:1).
About this color
#436C73 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.047 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 5.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.63:1 |
| White text | 5.78:1 |
Values
| HEX | #436C73 |
| RGB | rgb(67, 108, 115) |
| HSL | hsl(189, 26%, 36%) |
| OKLCH | oklch(50.4% 0.047 209.4) |
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 #436C73 | 5.78:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #436C73 | 3.63:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #436C73 text on white | 5.78:1 | AA | Lc 78.9 | Fine for body text |
| #436C73 text on black | 3.63:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDE
oklch(88.6% 0.013 208.8)
-
Step 300
300
#B1C5C9
oklch(81% 0.023 211.1)
-
Step 400
400
#87A7AD
oklch(70.6% 0.036 210.3)
-
Step 500
500
#689299
oklch(63.2% 0.047 208.9)
-
Step 600
600
#4F7C83
oklch(55.6% 0.05 208.2)
-
Step 700
700 (this color)
#436C73
oklch(50.4% 0.047 209.4)
-
Step 800
800
#35555B
oklch(42.7% 0.039 210.6)
-
Step 900
900
#2E464A
oklch(37.6% 0.03 209)
-
Step 950
950
#1B292C
oklch(27% 0.02 212.4)
#436C73 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) | #656973 | 0.044 |
| Deuteranopia (no green cones) | #5D6373 | 0.041 |
| Tritanopia (no blue cones) | #2F6F6E | 0.024 |
| Achromatopsia (no color) | #666666 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436C73
#436C73
oklch(50.4% 0.047 209.4)
- #7D5A55
#7D5A55
oklch(50.3% 0.047 28)
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 #436C73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Deep Turquoise #017374 ΔE 0.041
- Dark Aquamarine #017371 ΔE 0.043
- Deep Aqua #08787F ΔE 0.045
- Dark Aqua #05696B ΔE 0.046
- Metallic Blue #4F738E ΔE 0.047
- Dim Gray #696969 ΔE 0.050
- Bluegreen #017A79 ΔE 0.050
Use #436C73 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.