#51BF56
Closest named color: Leafy Green (#51B73B). oklch(71.7% 0.176 144.2), rgb(81, 191, 86).
Aa
Black text reads best on this color (8.93:1).
About this color
#51BF56 is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.176 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.029 away. Black text reads best on it, at 8.93:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.176) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.93:1 |
| White text | 2.34:1 |
Values
| HEX | #51BF56 |
| RGB | rgb(81, 191, 86) |
| HSL | hsl(123, 46%, 53%) |
| OKLCH | oklch(71.7% 0.176 144.2) |
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 #51BF56 | 2.34:1 | Fails | Lc -50.9 | Large or bold text, headings |
| Black text on #51BF56 | 8.93:1 | AAA | Lc 58.0 | Large or bold text, headings |
| #51BF56 text on white | 2.34:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #51BF56 text on black | 8.93:1 | AAA | Lc -56.1 | 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
#F0F8EF
oklch(97.1% 0.015 142.2)
-
Step 100
100
#DEF0DD
oklch(93.7% 0.032 143.9)
-
Step 200
200
#C1E4C0
oklch(88.4% 0.061 144.3)
-
Step 300
300
#94D493
oklch(81% 0.111 144.1)
-
Step 400
400 (this color)
#51BF56
oklch(71.7% 0.176 144.2)
-
Step 500
500
#00A624
oklch(63% 0.203 144.2)
-
Step 600
600
#008C1D
oklch(55.6% 0.179 144.2)
-
Step 700
700
#007617
oklch(49.1% 0.158 144.3)
-
Step 800
800
#006111
oklch(42.8% 0.138 144.2)
-
Step 900
900
#00510C
oklch(37.8% 0.122 144.2)
-
Step 950
950
#003005
oklch(26.9% 0.086 144.4)
#51BF56 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) | #C2AF4C | 0.131 |
| Deuteranopia (no green cones) | #B4A55E | 0.131 |
| Tritanopia (no blue cones) | #3DBAA7 | 0.109 |
| Achromatopsia (no color) | #A9A9A9 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BF56
#51BF56
oklch(71.7% 0.176 144.2)
- #D879E1
#D879E1
oklch(71.7% 0.176 324)
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 #51BF56, closest first.
No curated palette has a color within ΔE 0.04 of #51BF56.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.029
- Algae Green #21C36F ΔE 0.029
- Dark Mint #48C072 ΔE 0.030
- Shamrock Green #02C14D ΔE 0.033
- Turtle Green #75B84F ΔE 0.033
- Cool Green #33B864 ΔE 0.034
- Dark Mint Green #20C073 ΔE 0.035
- Frog Green #58BC08 ΔE 0.044
Use #51BF56 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.