#51B356
Closest named color: Dark Pastel Green (#56AE57). oklch(68.6% 0.16 144.5), rgb(81, 179, 86).
Aa
Black text reads best on this color (7.93:1).
About this color
#51B356 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.160 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.015 away. Black text reads best on it, at 7.93:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #51B356 |
| RGB | rgb(81, 179, 86) |
| HSL | hsl(123, 39%, 51%) |
| OKLCH | oklch(68.6% 0.16 144.5) |
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 #51B356 | 2.64:1 | Fails | Lc -56.4 | Large or bold text, headings |
| Black text on #51B356 | 7.93:1 | AAA | Lc 52.8 | Large or bold text, headings |
| #51B356 text on white | 2.64:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #51B356 text on black | 7.93:1 | AAA | Lc -50.6 | 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 400.
-
Step 50
50
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDE
oklch(93.6% 0.028 143.7)
-
Step 200
200
#C3E3C3
oklch(88.4% 0.055 145.1)
-
Step 300
300
#98D298
oklch(80.9% 0.1 144.6)
-
Step 400
400 (this color)
#51B356
oklch(68.6% 0.16 144.5)
-
Step 500
500
#00A627
oklch(63% 0.201 144.5)
-
Step 600
600
#008C20
oklch(55.6% 0.177 144.6)
-
Step 700
700
#007619
oklch(49.1% 0.157 144.5)
-
Step 800
800
#006113
oklch(42.8% 0.136 144.5)
-
Step 900
900
#00510E
oklch(37.8% 0.121 144.5)
-
Step 950
950
#013006
oklch(26.9% 0.084 144.5)
#51B356 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) | #B6A44E | 0.121 |
| Deuteranopia (no green cones) | #A99C5D | 0.119 |
| Tritanopia (no blue cones) | #41AF9E | 0.099 |
| Achromatopsia (no color) | #9F9F9F | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B356
#51B356
oklch(68.6% 0.16 144.5)
- #CA74D1
#CA74D1
oklch(68.6% 0.16 324.4)
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 #51B356, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.015
- Cool Green #33B864 ΔE 0.021
- Boring Green #63B365 ΔE 0.026
- Fern #63A950 ΔE 0.029
- Medium Green #39AD48 ΔE 0.029
- Leafy Green #51B73B ΔE 0.031
- Medium Sea Green #3CB371 ΔE 0.032
- Algae #54AC68 ΔE 0.034
Use #51B356 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.