#51BC45
Closest named color: Leafy Green (#51B73B). oklch(70.7% 0.186 141.7), rgb(81, 188, 69).
Aa
Black text reads best on this color (8.62:1).
About this color
#51BC45 is a medium-light, vivid green. In OKLCH its lightness is 71%, its chroma 0.186 and its hue 142°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.015 away. Black text reads best on it, at 8.62:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.186) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.62:1 |
| White text | 2.43:1 |
Values
| HEX | #51BC45 |
| RGB | rgb(81, 188, 69) |
| HSL | hsl(114, 47%, 50%) |
| OKLCH | oklch(70.7% 0.186 141.7) |
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 #51BC45 | 2.43:1 | Fails | Lc -52.5 | Large or bold text, headings |
| Black text on #51BC45 | 8.62:1 | AAA | Lc 56.5 | Large or bold text, headings |
| #51BC45 text on white | 2.43:1 | Fails | Lc 47.5 | Large or bold text, headings |
| #51BC45 text on black | 8.62:1 | AAA | Lc -54.5 | 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
#DEF0DB
oklch(93.6% 0.034 141.2)
-
Step 200
200
#C2E5BD
oklch(88.6% 0.065 141.6)
-
Step 300
300
#95D48D
oklch(80.9% 0.117 141.7)
-
Step 400
400 (this color)
#51BC45
oklch(70.7% 0.186 141.7)
-
Step 500
500
#1AA600
oklch(63.1% 0.211 141.7)
-
Step 600
600
#158C00
oklch(55.7% 0.186 141.6)
-
Step 700
700
#107600
oklch(49.2% 0.164 141.6)
-
Step 800
800
#0B6100
oklch(42.8% 0.143 141.7)
-
Step 900
900
#075100
oklch(37.8% 0.126 141.7)
-
Step 950
950
#033000
oklch(26.9% 0.09 141.6)
#51BC45 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) | #C0AC37 | 0.130 |
| Deuteranopia (no green cones) | #B3A34F | 0.130 |
| Tritanopia (no blue cones) | #42B6A3 | 0.122 |
| Achromatopsia (no color) | #A6A6A6 | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BC45
#51BC45
oklch(70.7% 0.186 141.7)
- #D473E5
#D473E5
oklch(70.6% 0.187 321.5)
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 #51BC45, closest first.
No curated palette has a color within ΔE 0.04 of #51BC45.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.015
- Shamrock Green #02C14D ΔE 0.028
- Frog Green #58BC08 ΔE 0.030
- Turtle Green #75B84F ΔE 0.037
- Cool Green #33B864 ΔE 0.038
- Algae Green #21C36F ΔE 0.042
- Shamrock #01B44C ΔE 0.042
- Grass #5CAC2D ΔE 0.043
Use #51BC45 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.