#538B3F
Closest named color: Fern Green (#548D44). oklch(58% 0.123 138.1), rgb(83, 139, 63).
Aa
Black text reads best on this color (5.13:1).
About this color
#538B3F is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.123 and its hue 138°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.007 away. Black text reads best on it, at 5.13:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.13:1 |
| White text | 4.09:1 |
Values
| HEX | #538B3F |
| RGB | rgb(83, 139, 63) |
| HSL | hsl(104, 38%, 40%) |
| OKLCH | oklch(58% 0.123 138.1) |
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 #538B3F | 4.09:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #538B3F | 5.13:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #538B3F text on white | 4.09:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #538B3F text on black | 5.13:1 | AA | Lc -33.7 | 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
#F3F7F2
oklch(97.2% 0.008 139.4)
-
Step 100
100
#E5EDE2
oklch(93.7% 0.017 137)
-
Step 200
200
#CFDECB
oklch(88.4% 0.03 139.1)
-
Step 300
300
#AFCAA7
oklch(80.9% 0.056 138.6)
-
Step 400
400
#85AE78
oklch(70.7% 0.088 138.3)
-
Step 500
500
#669A54
oklch(63.2% 0.114 138.1)
-
Step 600
600 (this color)
#538B3F
oklch(58% 0.123 138.1)
-
Step 700
700
#3D6F2A
oklch(49% 0.114 138)
-
Step 800
800
#335B24
oklch(42.8% 0.095 138)
-
Step 900
900
#2D4B22
oklch(37.8% 0.075 137.9)
-
Step 950
950
#1B2C15
oklch(27.1% 0.047 137.9)
#538B3F 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) | #8F8138 | 0.081 |
| Deuteranopia (no green cones) | #877C44 | 0.081 |
| Tritanopia (no blue cones) | #50877A | 0.085 |
| Achromatopsia (no color) | #7D7D7D | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538B3F
#538B3F
oklch(58% 0.123 138.1)
- #9861A9
#9861A9
oklch(58% 0.123 317.9)
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 #538B3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.007
- Moss Green #658B38 ΔE 0.020
- Light Forest Green #4F9153 ΔE 0.024
- Mossy Green #638B27 ΔE 0.025
- Swamp #698339 ΔE 0.031
- Sap Green #5C8B15 ΔE 0.032
- Olive Drab #6B8E23 ΔE 0.036
- Sea Green #2E8B57 ΔE 0.037
Use #538B3F 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.