#538A37
Closest named color: Fern Green (#548D44). oklch(57.6% 0.129 136.4), rgb(83, 138, 55).
Aa
Black text reads best on this color (5.05:1).
About this color
#538A37 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.129 and its hue 136°. 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 5.05:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #538A37 |
| RGB | rgb(83, 138, 55) |
| HSL | hsl(100, 43%, 38%) |
| OKLCH | oklch(57.6% 0.129 136.4) |
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 #538A37 | 4.15:1 | AA large text | Lc -73.9 | Content text, not long reading |
| Black text on #538A37 | 5.05:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #538A37 text on white | 4.15:1 | AA large text | Lc 68.4 | Content text, not long reading |
| #538A37 text on black | 5.05:1 | AA | Lc -33.3 | 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
#D0DECA
oklch(88.5% 0.031 136.2)
-
Step 300
300
#B0CAA5
oklch(81% 0.058 136.4)
-
Step 400
400
#86AE74
oklch(70.7% 0.092 136.3)
-
Step 500
500
#679A4E
oklch(63.2% 0.12 136.2)
-
Step 600
600 (this color)
#538A37
oklch(57.6% 0.129 136.4)
-
Step 700
700
#3E6F23
oklch(49% 0.12 136.3)
-
Step 800
800
#335B1F
oklch(42.7% 0.1 136.7)
-
Step 900
900
#2D4B1F
oklch(37.8% 0.078 136.7)
-
Step 950
950
#1B2C13
oklch(27.1% 0.049 136.4)
#538A37 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) | #8F7F2E | 0.083 |
| Deuteranopia (no green cones) | #877B3D | 0.082 |
| Tritanopia (no blue cones) | #518578 | 0.092 |
| Achromatopsia (no color) | #7C7C7C | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538A37
#538A37
oklch(57.6% 0.129 136.4)
- #975FAC
#975FAC
oklch(57.7% 0.129 316.3)
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 #538A37, 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 0.021
- Moss Green #658B38 ΔE 0.022
- Sap Green #5C8B15 ΔE 0.025
- Light Forest Green #4F9153 ΔE 0.032
- Swamp #698339 ΔE 0.033
- Olive Drab #6B8E23 ΔE 0.034
- Khaki Green #728639 ΔE 0.039
Use #538A37 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.