#129F3F
Closest named color: Grass Green (#3F9B0B). oklch(61.4% 0.175 147.5), rgb(18, 159, 63).
Aa
Black text reads best on this color (6.05:1).
About this color
#129F3F is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.175 and its hue 148°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grass Green (#3F9B0B), ΔE 0.031 away. Black text reads best on it, at 6.05:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Grass Green (#3F9B0B) |
| Black text | 6.05:1 |
| White text | 3.46:1 |
Values
| HEX | #129F3F |
| RGB | rgb(18, 159, 63) |
| HSL | hsl(139, 80%, 35%) |
| OKLCH | oklch(61.4% 0.175 147.5) |
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 #129F3F | 3.46:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #129F3F | 6.05:1 | AA | Lc 42.5 | Non-text elements, placeholder text |
| #129F3F text on white | 3.46:1 | AA large text | Lc 61.6 | Content text, not long reading |
| #129F3F text on black | 6.05:1 | AA | Lc -40.1 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#DFEFE1
oklch(93.6% 0.025 149.1)
-
Step 200
200
#C5E2C8
oklch(88.4% 0.047 148.1)
-
Step 300
300
#9CD0A1
oklch(80.9% 0.085 147.2)
-
Step 400
400
#5FB76D
oklch(70.6% 0.137 147.5)
-
Step 500
500 (this color)
#129F3F
oklch(61.4% 0.175 147.5)
-
Step 600
600
#008B34
oklch(55.5% 0.162 147.6)
-
Step 700
700
#00752A
oklch(49% 0.144 147.5)
-
Step 800
800
#006021
oklch(42.6% 0.125 147.5)
-
Step 900
900
#00501A
oklch(37.6% 0.11 147.5)
-
Step 950
950
#052F10
oklch(26.9% 0.071 148)
#129F3F 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) | #A19035 | 0.137 |
| Deuteranopia (no green cones) | #928647 | 0.135 |
| Tritanopia (no blue cones) | #009B8A | 0.104 |
| Achromatopsia (no color) | #8A8A8A | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129F3F
#129F3F
oklch(61.4% 0.175 147.5)
- #B957B9
#B957B9
oklch(61.3% 0.175 327.4)
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 #129F3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grass Green #3F9B0B ΔE 0.031
- Irish Green #019529 ΔE 0.033
- Grassy Green #419C03 ΔE 0.033
- Kelley Green #009337 ΔE 0.036
- Kelly Green #02AB2E ΔE 0.042
- True Green #089404 ΔE 0.044
- Mid Green #50A747 ΔE 0.045
- Medium Green #39AD48 ΔE 0.047
Use #129F3F 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.