#378D78
Closest named color: Dusty Teal (#4C9085). oklch(58.5% 0.089 174.2), rgb(55, 141, 120).
Aa
Black text reads best on this color (5.24:1).
About this color
#378D78 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.089 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Teal (#4C9085), ΔE 0.029 away. Black text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dusty Teal (#4C9085) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #378D78 |
| RGB | rgb(55, 141, 120) |
| HSL | hsl(165, 44%, 38%) |
| OKLCH | oklch(58.5% 0.089 174.2) |
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 #378D78 | 4.00:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #378D78 | 5.24:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #378D78 text on white | 4.00:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #378D78 text on black | 5.24:1 | AA | Lc -34.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECE9
oklch(93.5% 0.011 176.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7CABF
oklch(81% 0.04 174.2)
-
Step 400
400
#76AE9E
oklch(70.7% 0.063 174.6)
-
Step 500
500
#4E9A86
oklch(63.2% 0.082 174.3)
-
Step 600
600 (this color)
#378D78
oklch(58.5% 0.089 174.2)
-
Step 700
700
#1E705D
oklch(49.2% 0.083 173.8)
-
Step 800
800
#1C5B4C
oklch(42.7% 0.068 174)
-
Step 900
900
#1E4B3F
oklch(37.7% 0.054 173.3)
-
Step 950
950
#132C25
oklch(27% 0.034 173.4)
#378D78 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) | #888477 | 0.092 |
| Deuteranopia (no green cones) | #7C7B7A | 0.090 |
| Tritanopia (no blue cones) | #008F87 | 0.026 |
| Achromatopsia (no color) | #7F7F7F | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378D78
#378D78
oklch(58.5% 0.089 174.2)
- #A5657F
#A5657F
oklch(58.5% 0.089 354.3)
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 #378D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Teal #4C9085 ΔE 0.029
- Viridian #1E9167 ΔE 0.035
- Dark Cyan #008B8B ΔE 0.036
- Ocean Green #3D9973 ΔE 0.041
- Teal Green #0A9396 ΔE 0.043
- Blue Green #0F9B8E ΔE 0.044
- Slate Green #658D6D ΔE 0.044
- Sea #3C9992 ΔE 0.046
Use #378D78 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.