#378C59
Closest named color: Sea Green (#2E8B57). oklch(57.5% 0.114 154.1), rgb(55, 140, 89).
Aa
Black text reads best on this color (5.05:1).
About this color
#378C59 is a medium-dark, moderately saturated green. In OKLCH its lightness is 57%, its chroma 0.114 and its hue 154°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.008 away. Black text reads best on it, at 5.05:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #378C59 |
| RGB | rgb(55, 140, 89) |
| HSL | hsl(144, 44%, 38%) |
| OKLCH | oklch(57.5% 0.114 154.1) |
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 #378C59 | 4.15:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #378C59 | 5.05:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #378C59 text on white | 4.15:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #378C59 text on black | 5.05:1 | AA | Lc -33.4 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E3EDE5
oklch(93.6% 0.015 151.8)
-
Step 200
200
#CBDFD1
oklch(88.5% 0.029 155.2)
-
Step 300
300
#A8CBB2
oklch(81% 0.051 154.1)
-
Step 400
400
#77B089
oklch(70.7% 0.083 153.9)
-
Step 500
500
#519C6C
oklch(63.1% 0.105 154.1)
-
Step 600
600 (this color)
#378C59
oklch(57.5% 0.114 154.1)
-
Step 700
700
#227244
oklch(49.2% 0.106 154)
-
Step 800
800
#1F5D38
oklch(42.8% 0.088 153.9)
-
Step 900
900
#204C31
oklch(37.7% 0.068 154.5)
-
Step 950
950
#142D1D
oklch(27.1% 0.043 154.3)
#378C59 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) | #8C8156 | 0.101 |
| Deuteranopia (no green cones) | #80795C | 0.098 |
| Tritanopia (no blue cones) | #198A7F | 0.058 |
| Achromatopsia (no color) | #7C7C7C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #378C59
#378C59
oklch(57.5% 0.114 154.1)
- #A15D94
#A15D94
oklch(57.4% 0.114 334.4)
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 #378C59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.008
- Viridian #1E9167 ΔE 0.021
- Light Forest Green #4F9153 ΔE 0.028
- Fern Green #548D44 ΔE 0.034
- Dark Sage #598556 ΔE 0.034
- Ocean Green #3D9973 ΔE 0.047
- Jungle Green #048243 ΔE 0.048
- Moss Green #658B38 ΔE 0.052
Use #378C59 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.