#378E6A
Closest named color: Viridian (#1E9167). oklch(58.4% 0.101 163), rgb(55, 142, 106).
Aa
Black text reads best on this color (5.23:1).
About this color
#378E6A is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.101 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.017 away. Black text reads best on it, at 5.23:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.23:1 |
| White text | 4.00:1 |
Values
| HEX | #378E6A |
| RGB | rgb(55, 142, 106) |
| HSL | hsl(155, 44%, 39%) |
| OKLCH | oklch(58.4% 0.101 163) |
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 #378E6A | 4.00:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #378E6A | 5.23:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #378E6A text on white | 4.00:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #378E6A text on black | 5.23:1 | AA | Lc -34.5 | 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
#E2EDE7
oklch(93.6% 0.014 162.5)
-
Step 200
200
#CBDFD4
oklch(88.6% 0.026 161.9)
-
Step 300
300
#A7CAB8
oklch(80.8% 0.045 162.9)
-
Step 400
400
#76AF94
oklch(70.7% 0.072 163.4)
-
Step 500
500
#4F9B79
oklch(63.1% 0.093 162.8)
-
Step 600
600 (this color)
#378E6A
oklch(58.4% 0.101 163)
-
Step 700
700
#1E7151
oklch(49.1% 0.094 162.9)
-
Step 800
800
#1C5C42
oklch(42.7% 0.078 162.6)
-
Step 900
900
#1E4C38
oklch(37.8% 0.062 162.5)
-
Step 950
950
#132C21
oklch(26.9% 0.038 163.5)
#378E6A 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) | #8C8468 | 0.099 |
| Deuteranopia (no green cones) | #7F7B6C | 0.095 |
| Tritanopia (no blue cones) | #058E84 | 0.041 |
| Achromatopsia (no color) | #7F7F7F | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378E6A
#378E6A
oklch(58.4% 0.101 163)
- #A5628B
#A5628B
oklch(58.4% 0.102 343.3)
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 #378E6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.017
- Sea Green #2E8B57 ΔE 0.028
- Ocean Green #3D9973 ΔE 0.034
- Dark Sage #598556 ΔE 0.038
- Light Forest Green #4F9153 ΔE 0.038
- Slate Green #658D6D ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.046
- Fern Green #548D44 ΔE 0.050
Use #378E6A 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.