#3F8575
Closest named color: Dark Cyan (#008B8B). oklch(56.7% 0.075 176.5), rgb(63, 133, 117).
Aa
Black text reads best on this color (4.82:1).
About this color
#3F8575 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.075 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.037 away. Black text reads best on it, at 4.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.82:1 |
| White text | 4.35:1 |
Values
| HEX | #3F8575 |
| RGB | rgb(63, 133, 117) |
| HSL | hsl(166, 36%, 38%) |
| OKLCH | oklch(56.7% 0.075 176.5) |
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 #3F8575 | 4.35:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #3F8575 | 4.82:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #3F8575 text on white | 4.35:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #3F8575 text on black | 4.82:1 | AA | Lc -31.7 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CDDDD9
oklch(88.4% 0.018 179.3)
-
Step 300
300
#ABC8C0
oklch(80.9% 0.033 177)
-
Step 400
400
#7CAC9F
oklch(70.6% 0.055 176)
-
Step 500
500
#599788
oklch(63% 0.069 176.7)
-
Step 600
600 (this color)
#3F8575
oklch(56.7% 0.075 176.5)
-
Step 700
700
#2D6E5F
oklch(49.2% 0.071 175.7)
-
Step 800
800
#27594E
oklch(42.6% 0.057 177)
-
Step 900
900
#254A41
oklch(37.8% 0.046 176.1)
-
Step 950
950
#162B26
oklch(27% 0.029 177.1)
#3F8575 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) | #817E74 | 0.080 |
| Deuteranopia (no green cones) | #767676 | 0.075 |
| Tritanopia (no blue cones) | #1D8780 | 0.023 |
| Achromatopsia (no color) | #797979 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8575
#3F8575
oklch(56.7% 0.075 176.5)
- #9A6377
#9A6377
oklch(56.5% 0.076 356.4)
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 #3F8575, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.037
- Teal #008080 ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.040
- Dark Sage #598556 ΔE 0.048
- Slate Green #658D6D ΔE 0.051
- Bluegreen #017A79 ΔE 0.051
- Viridian #1E9167 ΔE 0.051
- Teal Green #0A9396 ΔE 0.054
Use #3F8575 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.