#3F6F73
Closest named color: Deep Turquoise (#017374). oklch(50.9% 0.053 202.5), rgb(63, 111, 115).
Aa
White text reads best on this color (5.62:1).
About this color
#3F6F73 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 51%, its chroma 0.053 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.034 away. White text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.73:1 |
| White text | 5.62:1 |
Values
| HEX | #3F6F73 |
| RGB | rgb(63, 111, 115) |
| HSL | hsl(185, 29%, 35%) |
| OKLCH | oklch(50.9% 0.053 202.5) |
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 #3F6F73 | 5.62:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #3F6F73 | 3.73:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #3F6F73 text on white | 5.62:1 | AA | Lc 78.0 | Fine for body text |
| #3F6F73 text on black | 3.73:1 | AA large text | Lc -23.7 | 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
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AEC6C8
oklch(80.9% 0.026 202.8)
-
Step 400
400
#83A9AC
oklch(70.8% 0.041 202.3)
-
Step 500
500
#639397
oklch(63.1% 0.052 202.5)
-
Step 600
600
#497D82
oklch(55.5% 0.056 203.6)
-
Step 700
700 (this color)
#3F6F73
oklch(50.9% 0.053 202.5)
-
Step 800
800
#305659
oklch(42.6% 0.044 202.2)
-
Step 900
900
#2B4749
oklch(37.7% 0.034 201.6)
-
Step 950
950
#1A2A2B
oklch(27.1% 0.021 200.9)
#3F6F73 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) | #686B73 | 0.052 |
| Deuteranopia (no green cones) | #606573 | 0.049 |
| Tritanopia (no blue cones) | #267270 | 0.023 |
| Achromatopsia (no color) | #676767 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6F73
#3F6F73
oklch(50.9% 0.053 202.5)
- #825A58
#825A58
oklch(51% 0.053 22.3)
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 #3F6F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.034
- Slate #516572 ΔE 0.035
- Dark Aquamarine #017371 ΔE 0.036
- Deep Aqua #08787F ΔE 0.037
- Bluegreen #017A79 ΔE 0.041
- Dark Aqua #05696B ΔE 0.045
- Metallic Blue #4F738E ΔE 0.048
- Teal #008080 ΔE 0.053
Use #3F6F73 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.