#51C359
Closest named color: Algae Green (#21C36F). oklch(72.8% 0.179 144.7), rgb(81, 195, 89).
Aa
Black text reads best on this color (9.30:1).
About this color
#51C359 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.179 and its hue 145°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.029 away. Black text reads best on it, at 9.30:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.30:1 |
| White text | 2.25:1 |
Values
| HEX | #51C359 |
| RGB | rgb(81, 195, 89) |
| HSL | hsl(124, 49%, 54%) |
| OKLCH | oklch(72.8% 0.179 144.7) |
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 #51C359 | 2.25:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #51C359 | 9.30:1 | AAA | Lc 59.8 | Large or bold text, headings |
| #51C359 text on white | 2.25:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #51C359 text on black | 9.30:1 | AAA | Lc -58.0 | 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
#DDF0DD
oklch(93.6% 0.032 145.3)
-
Step 200
200
#C1E5C0
oklch(88.6% 0.063 144.3)
-
Step 300
300
#92D493
oklch(80.9% 0.112 144.8)
-
Step 400
400 (this color)
#51C359
oklch(72.8% 0.179 144.7)
-
Step 500
500
#00A629
oklch(63% 0.2 144.7)
-
Step 600
600
#008C21
oklch(55.6% 0.177 144.7)
-
Step 700
700
#00761A
oklch(49.2% 0.156 144.6)
-
Step 800
800
#006114
oklch(42.8% 0.136 144.7)
-
Step 900
900
#00510F
oklch(37.8% 0.12 144.7)
-
Step 950
950
#003006
oklch(26.9% 0.085 144.8)
#51C359 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) | #C6B34F | 0.134 |
| Deuteranopia (no green cones) | #B8A961 | 0.133 |
| Tritanopia (no blue cones) | #3BBEAB | 0.110 |
| Achromatopsia (no color) | #ACACAC | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C359
#51C359
oklch(72.8% 0.179 144.7)
- #DD7BE4
#DD7BE4
oklch(72.8% 0.178 324.7)
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 #51C359, closest first.
No curated palette has a color within ΔE 0.04 of #51C359.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.029
- Dark Mint #48C072 ΔE 0.032
- Shamrock Green #02C14D ΔE 0.035
- Dark Mint Green #20C073 ΔE 0.037
- Turtle Green #75B84F ΔE 0.038
- Leafy Green #51B73B ΔE 0.038
- Cool Green #33B864 ΔE 0.042
- Apple #6ECB3C ΔE 0.043
Use #51C359 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.