#378C6D
Closest named color: Viridian (#1E9167). oklch(57.9% 0.096 166), rgb(55, 140, 109).
Aa
Black text reads best on this color (5.13:1).
About this color
#378C6D is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.096 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.024 away. Black text reads best on it, at 5.13:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.13:1 |
| White text | 4.08:1 |
Values
| HEX | #378C6D |
| RGB | rgb(55, 140, 109) |
| HSL | hsl(158, 44%, 38%) |
| OKLCH | oklch(57.9% 0.096 166) |
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 #378C6D | 4.08:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #378C6D | 5.13:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #378C6D text on white | 4.08:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #378C6D text on black | 5.13:1 | AA | Lc -33.8 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE8
oklch(93.7% 0.013 164.8)
-
Step 200
200
#CBDED5
oklch(88.4% 0.024 165.8)
-
Step 300
300
#A7CABA
oklch(80.9% 0.044 165.9)
-
Step 400
400
#77AF97
oklch(70.8% 0.069 165.9)
-
Step 500
500
#509B7D
oklch(63.2% 0.089 165.5)
-
Step 600
600 (this color)
#378C6D
oklch(57.9% 0.096 166)
-
Step 700
700
#207055
oklch(49% 0.088 166.3)
-
Step 800
800
#1D5C46
oklch(42.8% 0.074 166.3)
-
Step 900
900
#1F4B3A
oklch(37.6% 0.057 165.6)
-
Step 950
950
#132C22
oklch(26.9% 0.037 165.7)
#378C6D 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) | #89836B | 0.095 |
| Deuteranopia (no green cones) | #7D7A6F | 0.092 |
| Tritanopia (no blue cones) | #028C83 | 0.036 |
| Achromatopsia (no color) | #7D7D7D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378C6D
#378C6D
oklch(57.9% 0.096 166)
- #A36286
#A36286
oklch(58% 0.096 346.2)
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 #378C6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.024
- Sea Green #2E8B57 ΔE 0.033
- Dark Sage #598556 ΔE 0.038
- Ocean Green #3D9973 ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.042
- Slate Green #658D6D ΔE 0.045
- Light Forest Green #4F9153 ΔE 0.046
- Dark Cyan #008B8B ΔE 0.048
Use #378C6D 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.