#3F7540
Closest named color: Dark Olive Green (#556B2F). oklch(51.1% 0.1 144.3), rgb(63, 117, 64).
Aa
White text reads best on this color (5.48:1).
About this color
#3F7540 is a medium-dark, moderately saturated green. In OKLCH its lightness is 51%, its chroma 0.100 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Olive Green (#556B2F), ΔE 0.035 away. White text reads best on it, at 5.48:1.
| Hue family | Greens |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Dark Olive Green (#556B2F) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #3F7540 |
| RGB | rgb(63, 117, 64) |
| HSL | hsl(121, 30%, 35%) |
| OKLCH | oklch(51.1% 0.1 144.3) |
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 #3F7540 | 5.48:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #3F7540 | 3.82:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #3F7540 text on white | 5.48:1 | AA | Lc 77.2 | Fine for body text |
| #3F7540 text on black | 3.82:1 | AA large text | Lc -24.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F7F3
oklch(97.2% 0.007 145.5)
-
Step 100
100
#E4ECE4
oklch(93.5% 0.014 145.5)
-
Step 200
200
#CFDECE
oklch(88.5% 0.027 143.6)
-
Step 300
300
#AEC9AD
oklch(80.8% 0.049 144.2)
-
Step 400
400
#83AE82
oklch(70.8% 0.078 144.1)
-
Step 500
500
#639963
oklch(63.1% 0.098 144.3)
-
Step 600
600
#488349
oklch(55.5% 0.107 144.3)
-
Step 700
700 (this color)
#3F7540
oklch(51.1% 0.1 144.3)
-
Step 800
800
#305B31
oklch(42.8% 0.083 144.4)
-
Step 900
900
#2B4A2B
oklch(37.6% 0.064 144.2)
-
Step 950
950
#1A2C1A
oklch(27.1% 0.04 144.4)
#3F7540 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) | #776C3C | 0.076 |
| Deuteranopia (no green cones) | #6F6743 | 0.075 |
| Tritanopia (no blue cones) | #387268 | 0.062 |
| Achromatopsia (no color) | #696969 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7540
#3F7540
oklch(51.1% 0.1 144.3)
- #825186
#825186
oklch(51% 0.1 324.2)
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 #3F7540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive Green #556B2F ΔE 0.035
- Dark Moss Green #606C38 ΔE 0.044
- Muddy Green #657432 ΔE 0.046
- Jungle Green #048243 ΔE 0.046
- Camo Green #526525 ΔE 0.049
- Military Green #667C3E ΔE 0.054
- Tree Green #2A7E19 ΔE 0.058
- Mud Green #606602 ΔE 0.060
Use #3F7540 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.