#309B4F
Closest named color: Light Forest Green (#4F9153). oklch(61.1% 0.148 149.2), rgb(48, 155, 79).
Aa
Black text reads best on this color (5.92:1).
About this color
#309B4F is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.148 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Light Forest Green (#4F9153), ΔE 0.037 away. Black text reads best on it, at 5.92:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Light Forest Green (#4F9153) |
| Black text | 5.92:1 |
| White text | 3.54:1 |
Values
| HEX | #309B4F |
| RGB | rgb(48, 155, 79) |
| HSL | hsl(137, 53%, 40%) |
| OKLCH | oklch(61.1% 0.148 149.2) |
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 #309B4F | 3.54:1 | AA large text | Lc -68.1 | Content text, not long reading |
| Black text on #309B4F | 5.92:1 | AA | Lc 41.5 | Non-text elements, placeholder text |
| #309B4F text on white | 3.54:1 | AA large text | Lc 62.6 | Content text, not long reading |
| #309B4F text on black | 5.92:1 | AA | Lc -39.1 | 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 500.
-
Step 50
50
#F1F7F2
oklch(97% 0.009 150.7)
-
Step 100
100
#E1EEE2
oklch(93.6% 0.021 147.6)
-
Step 200
200
#C8E1CB
oklch(88.5% 0.04 148.7)
-
Step 300
300
#A0CEA8
oklch(80.8% 0.072 149.8)
-
Step 400
400
#69B578
oklch(70.8% 0.117 149.1)
-
Step 500
500 (this color)
#309B4F
oklch(61.1% 0.148 149.2)
-
Step 600
600
#008B3B
oklch(55.6% 0.156 149.2)
-
Step 700
700
#007531
oklch(49.1% 0.138 149.3)
-
Step 800
800
#006027
oklch(42.7% 0.12 149.3)
-
Step 900
900
#0E4F23
oklch(37.7% 0.096 149.3)
-
Step 950
950
#0C2E15
oklch(26.9% 0.06 149.3)
#309B4F 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) | #9C8E49 | 0.120 |
| Deuteranopia (no green cones) | #8F8454 | 0.119 |
| Tritanopia (no blue cones) | #009889 | 0.083 |
| Achromatopsia (no color) | #888888 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309B4F
#309B4F
oklch(61.1% 0.148 149.2)
- #B35FAE
#B35FAE
oklch(61.1% 0.148 329.4)
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 #309B4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Forest Green #4F9153 ΔE 0.037
- Kelley Green #009337 ΔE 0.039
- Muted Green #5FA052 ΔE 0.043
- Fern Green #548D44 ΔE 0.043
- Irish Green #019529 ΔE 0.045
- Mid Green #50A747 ΔE 0.047
- Grass Green #3F9B0B ΔE 0.049
- Jade #1FA774 ΔE 0.049
Use #309B4F 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.