#3F8178
Closest named color: Teal (#008080). oklch(55.7% 0.069 183.8), rgb(63, 129, 120).
Aa
Black text reads best on this color (4.62:1).
About this color
#3F8178 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.069 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.031 away. Black text reads best on it, at 4.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.62:1 |
| White text | 4.54:1 |
Values
| HEX | #3F8178 |
| RGB | rgb(63, 129, 120) |
| HSL | hsl(172, 34%, 38%) |
| OKLCH | oklch(55.7% 0.069 183.8) |
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 #3F8178 | 4.54:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #3F8178 | 4.62:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #3F8178 text on white | 4.54:1 | AA | Lc 71.4 | Content text, not long reading |
| #3F8178 text on black | 4.62:1 | AA | Lc -30.3 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
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
#ABC8C3
oklch(81% 0.032 184)
-
Step 400
400
#7EABA4
oklch(70.7% 0.049 184.3)
-
Step 500
500
#5B968E
oklch(63% 0.063 184.8)
-
Step 600
600 (this color)
#3F8178
oklch(55.7% 0.069 183.8)
-
Step 700
700
#306D65
oklch(49.2% 0.065 184)
-
Step 800
800
#295952
oklch(42.8% 0.054 183)
-
Step 900
900
#264944
oklch(37.7% 0.042 183.9)
-
Step 950
950
#172B28
oklch(27.1% 0.027 183.8)
#3F8178 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) | #7C7B78 | 0.074 |
| Deuteranopia (no green cones) | #717379 | 0.069 |
| Tritanopia (no blue cones) | #1D837E | 0.021 |
| Achromatopsia (no color) | #767676 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8178
#3F8178
oklch(55.7% 0.069 183.8)
- #96626F
#96626F
oklch(55.6% 0.069 3.3)
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 #3F8178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.031
- Dark Cyan #008B8B ΔE 0.038
- Bluegreen #017A79 ΔE 0.041
- Deep Aqua #08787F ΔE 0.047
- Dusty Teal #4C9085 ΔE 0.048
- Ocean #017B92 ΔE 0.057
- Dark Sage #598556 ΔE 0.058
- Deep Turquoise #017374 ΔE 0.058
Use #3F8178 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.