#538F39
Closest named color: Fern Green (#548D44). oklch(58.9% 0.135 137.3), rgb(83, 143, 57).
Aa
Black text reads best on this color (5.35:1).
About this color
#538F39 is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.135 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.015 away. Black text reads best on it, at 5.35:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.135) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.35:1 |
| White text | 3.92:1 |
Values
| HEX | #538F39 |
| RGB | rgb(83, 143, 57) |
| HSL | hsl(102, 43%, 39%) |
| OKLCH | oklch(58.9% 0.135 137.3) |
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 #538F39 | 3.92:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #538F39 | 5.35:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #538F39 text on white | 3.92:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #538F39 text on black | 5.35:1 | AA | Lc -35.2 | 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
#F3F7F1
oklch(97.1% 0.009 134.9)
-
Step 100
100
#E4EDE1
oklch(93.6% 0.019 137.8)
-
Step 200
200
#CFDFC9
oklch(88.6% 0.034 137.1)
-
Step 300
300
#AECAA4
oklch(80.8% 0.06 137.5)
-
Step 400
400
#83AF73
oklch(70.7% 0.097 137.6)
-
Step 500
500
#639B4D
oklch(63.2% 0.125 137.5)
-
Step 600
600 (this color)
#538F39
oklch(58.9% 0.135 137.3)
-
Step 700
700
#3A7021
oklch(49% 0.125 137.4)
-
Step 800
800
#315C1D
oklch(42.9% 0.104 137.2)
-
Step 900
900
#2B4B1E
oklch(37.6% 0.081 137.5)
-
Step 950
950
#1A2C12
oklch(27% 0.051 136.8)
#538F39 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) | #938430 | 0.086 |
| Deuteranopia (no green cones) | #8B7F3F | 0.086 |
| Tritanopia (no blue cones) | #508A7C | 0.094 |
| Achromatopsia (no color) | #818181 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538F39
#538F39
oklch(58.9% 0.135 137.3)
- #9D61B1
#9D61B1
oklch(58.9% 0.134 317.3)
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 #538F39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.015
- Mossy Green #638B27 ΔE 0.020
- Moss Green #658B38 ΔE 0.022
- Sap Green #5C8B15 ΔE 0.024
- Light Forest Green #4F9153 ΔE 0.028
- Olive Drab #6B8E23 ΔE 0.028
- Dark Yellow Green #728F02 ΔE 0.041
- Swamp #698339 ΔE 0.042
Use #538F39 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.