#399A51
Closest named color: Light Forest Green (#4F9153). oklch(61.1% 0.141 148.6), rgb(57, 154, 81).
Aa
Black text reads best on this color (5.91:1).
About this color
#399A51 is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.141 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 0.031 away. Black text reads best on it, at 5.91:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Light Forest Green (#4F9153) |
| Black text | 5.91:1 |
| White text | 3.55:1 |
Values
| HEX | #399A51 |
| RGB | rgb(57, 154, 81) |
| HSL | hsl(135, 46%, 41%) |
| OKLCH | oklch(61.1% 0.141 148.6) |
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 #399A51 | 3.55:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #399A51 | 5.91:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #399A51 text on white | 3.55:1 | AA large text | Lc 62.8 | Content text, not long reading |
| #399A51 text on black | 5.91:1 | AA | Lc -38.9 | 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
#E1EEE3
oklch(93.6% 0.02 150.1)
-
Step 200
200
#C9E1CB
oklch(88.6% 0.039 147.6)
-
Step 300
300
#A2CEA8
oklch(81% 0.07 148.6)
-
Step 400
400
#6DB47A
oklch(70.8% 0.111 148.8)
-
Step 500
500 (this color)
#399A51
oklch(61.1% 0.141 148.6)
-
Step 600
600
#108A3B
oklch(55.5% 0.153 148.6)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#076026
oklch(42.8% 0.119 148.4)
-
Step 900
900
#144E24
oklch(37.6% 0.092 148.8)
-
Step 950
950
#0E2E16
oklch(27% 0.058 149.2)
#399A51 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) | #9B8D4B | 0.114 |
| Deuteranopia (no green cones) | #8F8556 | 0.112 |
| Tritanopia (no blue cones) | #1C9789 | 0.081 |
| Achromatopsia (no color) | #888888 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399A51
#399A51
oklch(61.1% 0.141 148.6)
- #B061AD
#B061AD
oklch(61% 0.141 328.5)
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 #399A51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Forest Green #4F9153 ΔE 0.031
- Fern Green #548D44 ΔE 0.039
- Muted Green #5FA052 ΔE 0.039
- Kelley Green #009337 ΔE 0.044
- Flat Green #699D4C ΔE 0.045
- Ocean Green #3D9973 ΔE 0.047
- Viridian #1E9167 ΔE 0.048
- Mid Green #50A747 ΔE 0.048
Use #399A51 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.