#3F8570
Closest named color: Dark Sage (#598556). oklch(56.5% 0.079 171.4), rgb(63, 133, 112).
Aa
Black text reads best on this color (4.80:1).
About this color
#3F8570 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.079 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.042 away. Black text reads best on it, at 4.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Sage (#598556) |
| Black text | 4.80:1 |
| White text | 4.37:1 |
Values
| HEX | #3F8570 |
| RGB | rgb(63, 133, 112) |
| HSL | hsl(162, 36%, 38%) |
| OKLCH | oklch(56.5% 0.079 171.4) |
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 #3F8570 | 4.37:1 | AA large text | Lc -75.6 | Fine for body text |
| Black text on #3F8570 | 4.80:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #3F8570 text on white | 4.37:1 | AA large text | Lc 70.1 | Content text, not long reading |
| #3F8570 text on black | 4.80:1 | AA | Lc -31.5 | 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
#CDDED7
oklch(88.6% 0.021 169.3)
-
Step 300
300
#ABC8BE
oklch(80.8% 0.034 172.6)
-
Step 400
400
#7DAC9C
oklch(70.6% 0.056 171.6)
-
Step 500
500
#599884
oklch(63.1% 0.072 171.5)
-
Step 600
600 (this color)
#3F8570
oklch(56.5% 0.079 171.4)
-
Step 700
700
#2E6E5B
oklch(49.1% 0.073 171)
-
Step 800
800
#275A4B
oklch(42.8% 0.061 171.6)
-
Step 900
900
#254A3E
oklch(37.7% 0.048 170.5)
-
Step 950
950
#162B25
oklch(26.9% 0.03 173.8)
#3F8570 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) | #817D6F | 0.081 |
| Deuteranopia (no green cones) | #777571 | 0.079 |
| Tritanopia (no blue cones) | #21867F | 0.026 |
| Achromatopsia (no color) | #797979 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8570
#3F8570
oklch(56.5% 0.079 171.4)
- #9A627B
#9A627B
oklch(56.5% 0.08 351.6)
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 #3F8570, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.042
- Dark Cyan #008B8B ΔE 0.042
- Dusty Teal #4C9085 ΔE 0.043
- Teal #008080 ΔE 0.043
- Viridian #1E9167 ΔE 0.046
- Sea Green #2E8B57 ΔE 0.049
- Slate Green #658D6D ΔE 0.049
- Bluegreen #017A79 ΔE 0.053
Use #3F8570 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.