#51AB5B
Closest named color: Dark Pastel Green (#56AE57). oklch(66.6% 0.144 146), rgb(81, 171, 91).
Aa
Black text reads best on this color (7.32:1).
About this color
#51AB5B is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.144 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.012 away. Black text reads best on it, at 7.32:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.32:1 |
| White text | 2.86:1 |
Values
| HEX | #51AB5B |
| RGB | rgb(81, 171, 91) |
| HSL | hsl(127, 36%, 49%) |
| OKLCH | oklch(66.6% 0.144 146) |
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 #51AB5B | 2.86:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #51AB5B | 7.32:1 | AAA | Lc 49.4 | Large or bold text, headings |
| #51AB5B text on white | 2.86:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #51AB5B text on black | 7.32:1 | AAA | Lc -47.2 | Large or bold text, headings |
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
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E2EEE2
oklch(93.7% 0.02 145.4)
-
Step 200
200
#C9E1CA
oklch(88.6% 0.04 146.4)
-
Step 300
300
#A4CDA6
oklch(80.8% 0.07 146.2)
-
Step 400
400
#70B375
oklch(70.6% 0.113 146)
-
Step 500
500 (this color)
#51AB5B
oklch(66.6% 0.144 146)
-
Step 600
600
#1D8A33
oklch(55.6% 0.157 146)
-
Step 700
700
#0B7525
oklch(49.1% 0.146 145.9)
-
Step 800
800
#115F21
oklch(42.6% 0.12 146.1)
-
Step 900
900
#184E20
oklch(37.6% 0.094 146)
-
Step 950
950
#102E13
oklch(27% 0.06 145.6)
#51AB5B 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) | #AD9E55 | 0.111 |
| Deuteranopia (no green cones) | #A19560 | 0.111 |
| Tritanopia (no blue cones) | #41A798 | 0.087 |
| Achromatopsia (no color) | #999999 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51AB5B
#51AB5B
oklch(66.6% 0.144 146)
- #C172C3
#C172C3
oklch(66.6% 0.144 326.2)
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 #51AB5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.012
- Algae #54AC68 ΔE 0.016
- Fern #63A950 ΔE 0.017
- Mid Green #50A747 ΔE 0.022
- Seaweed Green #35AD6B ΔE 0.022
- Jade Green #2BAF6A ΔE 0.024
- Medium Sea Green #3CB371 ΔE 0.029
- Off Green #6BA353 ΔE 0.029
Use #51AB5B 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.