#378F76
Closest named color: Viridian (#1E9167). oklch(59% 0.093 171.2), rgb(55, 143, 118).
Aa
Black text reads best on this color (5.35:1).
About this color
#378F76 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.030 away. Black text reads best on it, at 5.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.35:1 |
| White text | 3.92:1 |
Values
| HEX | #378F76 |
| RGB | rgb(55, 143, 118) |
| HSL | hsl(163, 44%, 39%) |
| OKLCH | oklch(59% 0.093 171.2) |
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 #378F76 | 3.92:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #378F76 | 5.35:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #378F76 text on white | 3.92:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #378F76 text on black | 5.35:1 | AA | Lc -35.3 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A7CABD
oklch(81% 0.042 170.7)
-
Step 400
400
#75AF9B
oklch(70.8% 0.068 170.7)
-
Step 500
500
#4D9A83
oklch(63% 0.085 171.7)
-
Step 600
600 (this color)
#378F76
oklch(59% 0.093 171.2)
-
Step 700
700
#1C705A
oklch(49% 0.086 171.1)
-
Step 800
800
#1B5C4A
oklch(42.9% 0.072 170.9)
-
Step 900
900
#1D4B3E
oklch(37.7% 0.055 172)
-
Step 950
950
#132C24
oklch(27% 0.035 170.7)
#378F76 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) | #8B8675 | 0.096 |
| Deuteranopia (no green cones) | #7E7D78 | 0.091 |
| Tritanopia (no blue cones) | #009088 | 0.030 |
| Achromatopsia (no color) | #808080 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378F76
#378F76
oklch(59% 0.093 171.2)
- #A76584
#A76584
oklch(58.9% 0.094 350.7)
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 #378F76, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.030
- Dusty Teal #4C9085 ΔE 0.030
- Ocean Green #3D9973 ΔE 0.033
- Blue Green #0F9B8E ΔE 0.041
- Dark Cyan #008B8B ΔE 0.042
- Slate Green #658D6D ΔE 0.042
- Sea Green #2E8B57 ΔE 0.045
- Sea #3C9992 ΔE 0.045
Use #378F76 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.