#538A18
Closest named color: Sap Green (#5C8B15). oklch(57.3% 0.151 132.9), rgb(83, 138, 24).
Aa
Black text reads best on this color (5.01:1).
About this color
#538A18 is a medium-dark, vivid green. In OKLCH its lightness is 57%, its chroma 0.151 and its hue 133°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sap Green (#5C8B15), ΔE 0.011 away. Black text reads best on it, at 5.01:1.
| Hue family | Greens |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Sap Green (#5C8B15) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #538A18 |
| RGB | rgb(83, 138, 24) |
| HSL | hsl(89, 70%, 32%) |
| OKLCH | oklch(57.3% 0.151 132.9) |
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 #538A18 | 4.18:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #538A18 | 5.01:1 | AA | Lc 35.5 | Non-text elements, placeholder text |
| #538A18 text on white | 4.18:1 | AA large text | Lc 68.6 | Content text, not long reading |
| #538A18 text on black | 5.01:1 | AA | Lc -33.0 | 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
#E5EDE0
oklch(93.6% 0.019 133.1)
-
Step 200
200
#D0DFC6
oklch(88.6% 0.037 132.7)
-
Step 300
300
#B0CB9E
oklch(81% 0.068 133)
-
Step 400
400
#86AF67
oklch(70.7% 0.109 132.7)
-
Step 500
500
#679B3B
oklch(63.2% 0.139 133)
-
Step 600
600 (this color)
#538A18
oklch(57.3% 0.151 132.9)
-
Step 700
700
#3F7000
oklch(49.1% 0.138 133)
-
Step 800
800
#345B06
oklch(42.6% 0.116 132.8)
-
Step 900
900
#2E4B12
oklch(37.7% 0.09 132.6)
-
Step 950
950
#1B2C0C
oklch(26.9% 0.058 132.6)
#538A18 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) | #907F00 | 0.085 |
| Deuteranopia (no green cones) | #897A25 | 0.087 |
| Tritanopia (no blue cones) | #538475 | 0.113 |
| Achromatopsia (no color) | #7C7C7C | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #538A18
#538A18
oklch(57.3% 0.151 132.9)
- #9759B7
#9759B7
oklch(57.3% 0.152 313)
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 #538A18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sap Green #5C8B15 ΔE 0.011
- Mossy Green #638B27 ΔE 0.023
- Olive Drab #6B8E23 ΔE 0.034
- Moss Green #658B38 ΔE 0.036
- Fern Green #548D44 ΔE 0.036
- Forest Green #228B22 ΔE 0.037
- Swamp Green #748500 ΔE 0.040
- Dark Yellow Green #728F02 ΔE 0.042
Use #538A18 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.