#129A5A
Closest named color: Viridian (#1E9167). oklch(60.5% 0.144 155.2), rgb(18, 154, 90).
Aa
Black text reads best on this color (5.79:1).
About this color
#129A5A is a medium-dark, vivid green. In OKLCH its lightness is 60%, its chroma 0.144 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.037 away. Black text reads best on it, at 5.79:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #129A5A |
| RGB | rgb(18, 154, 90) |
| HSL | hsl(152, 79%, 34%) |
| OKLCH | oklch(60.5% 0.144 155.2) |
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 #129A5A | 3.62:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #129A5A | 5.79:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #129A5A text on white | 3.62:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #129A5A text on black | 5.79:1 | AA | Lc -38.4 | 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
#F1F7F3
oklch(97.1% 0.008 157.1)
-
Step 100
100
#E0EEE4
oklch(93.6% 0.02 154.9)
-
Step 200
200
#C6E1CE
oklch(88.5% 0.039 154.9)
-
Step 300
300
#9CCFAD
oklch(80.9% 0.072 155.3)
-
Step 400
400
#61B582
oklch(70.6% 0.112 155.5)
-
Step 500
500 (this color)
#129A5A
oklch(60.5% 0.144 155.2)
-
Step 600
600
#008A4E
oklch(55.6% 0.137 155)
-
Step 700
700
#007441
oklch(49.1% 0.121 155.2)
-
Step 800
800
#005F34
oklch(42.6% 0.105 155.1)
-
Step 900
900
#004F2B
oklch(37.6% 0.092 155.5)
-
Step 950
950
#062F19
oklch(27.1% 0.06 155)
#129A5A 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) | #998D56 | 0.128 |
| Deuteranopia (no green cones) | #8B825E | 0.126 |
| Tritanopia (no blue cones) | #00988A | 0.071 |
| Achromatopsia (no color) | #868686 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129A5A
#129A5A
oklch(60.5% 0.144 155.2)
- #B55CA3
#B55CA3
oklch(60.5% 0.145 335.4)
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 #129A5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.037
- Light Forest Green #4F9153 ΔE 0.038
- Kelley Green #009337 ΔE 0.042
- Ocean Green #3D9973 ΔE 0.044
- Sea Green #2E8B57 ΔE 0.044
- Jade #1FA774 ΔE 0.046
- Fern Green #548D44 ΔE 0.048
- Irish Green #019529 ΔE 0.052
Use #129A5A 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.