#378C64
Closest named color: Viridian (#1E9167). oklch(57.7% 0.103 160), rgb(55, 140, 100).
Aa
Black text reads best on this color (5.09:1).
About this color
#378C64 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.103 and its hue 160°. 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 5.09:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #378C64 |
| RGB | rgb(55, 140, 100) |
| HSL | hsl(152, 44%, 38%) |
| OKLCH | oklch(57.7% 0.103 160) |
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 #378C64 | 4.11:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #378C64 | 5.09:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #378C64 text on white | 4.11:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #378C64 text on black | 5.09:1 | AA | Lc -33.6 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE7
oklch(93.7% 0.013 159.9)
-
Step 200
200
#CBDFD3
oklch(88.5% 0.027 159.5)
-
Step 300
300
#A8CAB6
oklch(80.8% 0.046 159.4)
-
Step 400
400
#77AF91
oklch(70.7% 0.074 160.3)
-
Step 500
500
#509B75
oklch(63% 0.095 159.8)
-
Step 600
600 (this color)
#378C64
oklch(57.7% 0.103 160)
-
Step 700
700
#21714D
oklch(49.1% 0.096 159.7)
-
Step 800
800
#1E5C40
oklch(42.7% 0.079 160.4)
-
Step 900
900
#1F4C36
oklch(37.8% 0.063 159.9)
-
Step 950
950
#142C20
oklch(26.9% 0.038 160.6)
#378C64 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) | #8A8262 | 0.097 |
| Deuteranopia (no green cones) | #7F7A67 | 0.095 |
| Tritanopia (no blue cones) | #108B81 | 0.045 |
| Achromatopsia (no color) | #7D7D7D | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378C64
#378C64
oklch(57.7% 0.103 160)
- #A2608D
#A2608D
oklch(57.8% 0.104 339.9)
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 #378C64, 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 0.020
- Dark Sage #598556 ΔE 0.034
- Light Forest Green #4F9153 ΔE 0.036
- Ocean Green #3D9973 ΔE 0.041
- Fern Green #548D44 ΔE 0.045
- Slate Green #658D6D ΔE 0.049
- Dusty Teal #4C9085 ΔE 0.054
Use #378C64 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.