#3F8378
Closest named color: Teal (#008080). oklch(56.2% 0.071 181.7), rgb(63, 131, 120).
Aa
Black text reads best on this color (4.72:1).
About this color
#3F8378 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.071 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.034 away. Black text reads best on it, at 4.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.72:1 |
| White text | 4.44:1 |
Values
| HEX | #3F8378 |
| RGB | rgb(63, 131, 120) |
| HSL | hsl(170, 35%, 38%) |
| OKLCH | oklch(56.2% 0.071 181.7) |
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 #3F8378 | 4.44:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #3F8378 | 4.72:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #3F8378 text on white | 4.44:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #3F8378 text on black | 4.72:1 | AA | Lc -31.0 | 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
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ABC8C2
oklch(81% 0.032 181.6)
-
Step 400
400
#7DACA3
oklch(70.8% 0.052 181.6)
-
Step 500
500
#5A978C
oklch(63.2% 0.066 181.3)
-
Step 600
600 (this color)
#3F8378
oklch(56.2% 0.071 181.7)
-
Step 700
700
#2E6D63
oklch(49.1% 0.067 181.5)
-
Step 800
800
#285951
oklch(42.7% 0.055 181.5)
-
Step 900
900
#254943
oklch(37.6% 0.043 181.9)
-
Step 950
950
#172B27
oklch(27.1% 0.027 180)
#3F8378 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) | #7E7C78 | 0.077 |
| Deuteranopia (no green cones) | #737479 | 0.073 |
| Tritanopia (no blue cones) | #1C8580 | 0.022 |
| Achromatopsia (no color) | #787878 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8378
#3F8378
oklch(56.2% 0.071 181.7)
- #996372
#996372
oklch(56.2% 0.072 1.6)
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 #3F8378, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.034
- Dark Cyan #008B8B ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.043
- Bluegreen #017A79 ΔE 0.045
- Deep Aqua #08787F ΔE 0.051
- Dark Sage #598556 ΔE 0.055
- Teal Green #0A9396 ΔE 0.055
- Slate Green #658D6D ΔE 0.057
Use #3F8378 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.