#3F736D
Closest named color: Dark Aquamarine (#017371). oklch(51.7% 0.057 186), rgb(63, 115, 109).
Aa
White text reads best on this color (5.40:1).
About this color
#3F736D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.057 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.034 away. White text reads best on it, at 5.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #3F736D |
| RGB | rgb(63, 115, 109) |
| HSL | hsl(173, 29%, 35%) |
| OKLCH | oklch(51.7% 0.057 186) |
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 #3F736D | 5.40:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #3F736D | 3.88:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #3F736D text on white | 5.40:1 | AA | Lc 76.8 | Fine for body text |
| #3F736D text on black | 3.88:1 | AA large text | Lc -24.9 | 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
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CFDDDA
oklch(88.6% 0.016 181.7)
-
Step 300
300
#AEC7C3
oklch(81% 0.028 185)
-
Step 400
400
#82AAA5
oklch(70.7% 0.044 186.8)
-
Step 500
500
#61958E
oklch(63.1% 0.057 185.2)
-
Step 600
600
#467F79
oklch(55.6% 0.061 186.9)
-
Step 700
700 (this color)
#3F736D
oklch(51.7% 0.057 186)
-
Step 800
800
#2E5753
oklch(42.6% 0.047 187.5)
-
Step 900
900
#2A4844
oklch(37.7% 0.037 185.1)
-
Step 950
950
#192A28
oklch(26.9% 0.023 186.7)
#3F736D 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) | #6E6E6D | 0.060 |
| Deuteranopia (no green cones) | #65676E | 0.058 |
| Tritanopia (no blue cones) | #297571 | 0.018 |
| Achromatopsia (no color) | #6A6A6A | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F736D
#3F736D
oklch(51.7% 0.057 186)
- #855B63
#855B63
oklch(51.8% 0.056 6.7)
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 #3F736D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.034
- Deep Turquoise #017374 ΔE 0.034
- Bluegreen #017A79 ΔE 0.035
- Deep Aqua #08787F ΔE 0.036
- Teal #008080 ΔE 0.045
- Slate #516572 ΔE 0.049
- Dark Aqua #05696B ΔE 0.051
- Dim Gray #696969 ΔE 0.057
Use #3F736D 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.