#3F736B
Closest named color: Dark Aquamarine (#017371). oklch(51.7% 0.058 183), rgb(63, 115, 107).
Aa
White text reads best on this color (5.41:1).
About this color
#3F736B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.058 and its hue 183°. 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 5.41:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.87:1 |
| White text | 5.41:1 |
Values
| HEX | #3F736B |
| RGB | rgb(63, 115, 107) |
| HSL | hsl(171, 29%, 35%) |
| OKLCH | oklch(51.7% 0.058 183) |
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 #3F736B | 5.41:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #3F736B | 3.87:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #3F736B text on white | 5.41:1 | AA | Lc 76.9 | Fine for body text |
| #3F736B text on black | 3.87:1 | AA large text | Lc -24.8 | 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
#AEC7C2
oklch(80.9% 0.028 182.2)
-
Step 400
400
#82AAA3
oklch(70.7% 0.045 183.1)
-
Step 500
500
#61958D
oklch(63.1% 0.057 183.8)
-
Step 600
600
#467F77
oklch(55.5% 0.062 184)
-
Step 700
700 (this color)
#3F736B
oklch(51.7% 0.058 183)
-
Step 800
800
#2F5851
oklch(42.8% 0.048 181.7)
-
Step 900
900
#2A4843
oklch(37.6% 0.037 182.5)
-
Step 950
950
#192A27
oklch(26.9% 0.023 182.2)
#3F736B 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) | #6F6E6B | 0.062 |
| Deuteranopia (no green cones) | #66676C | 0.059 |
| Tritanopia (no blue cones) | #2A7570 | 0.017 |
| Achromatopsia (no color) | #6A6A6A | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F736B
#3F736B
oklch(51.7% 0.058 183)
- #855A65
#855A65
oklch(51.7% 0.058 2.6)
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 #3F736B, 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 0.035
- Bluegreen #017A79 ΔE 0.035
- Deep Aqua #08787F ΔE 0.038
- Teal #008080 ΔE 0.046
- Slate #516572 ΔE 0.051
- Dark Aqua #05696B ΔE 0.052
- Dim Gray #696969 ΔE 0.058
Use #3F736B 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.