#51C45A
Closest named color: Algae Green (#21C36F). oklch(73% 0.179 144.8), rgb(81, 196, 90).
Aa
Black text reads best on this color (9.39:1).
About this color
#51C45A 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 0.030 away. Black text reads best on it, at 9.39:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.179) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #51C45A |
| RGB | rgb(81, 196, 90) |
| HSL | hsl(125, 49%, 54%) |
| OKLCH | oklch(73% 0.179 144.8) |
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 #51C45A | 2.23:1 | Fails | Lc -48.5 | Large or bold text, headings |
| Black text on #51C45A | 9.39:1 | AAA | Lc 60.3 | Content text, not long reading |
| #51C45A text on white | 2.23:1 | Fails | Lc 43.7 | Non-text elements, placeholder text |
| #51C45A text on black | 9.39:1 | AAA | Lc -58.5 | 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
#DDF0DD
oklch(93.6% 0.032 145.3)
-
Step 200
200
#C0E5C0
oklch(88.5% 0.063 145)
-
Step 300
300
#92D493
oklch(80.9% 0.112 144.8)
-
Step 400
400 (this color)
#51C45A
oklch(73% 0.179 144.8)
-
Step 500
500
#00A62B
oklch(63% 0.199 144.9)
-
Step 600
600
#008C22
oklch(55.6% 0.176 144.8)
-
Step 700
700
#00761B
oklch(49.2% 0.156 144.8)
-
Step 800
800
#006115
oklch(42.8% 0.135 144.8)
-
Step 900
900
#005110
oklch(37.8% 0.119 144.9)
-
Step 950
950
#003006
oklch(26.9% 0.085 144.8)
#51C45A 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) | #C7B450 | 0.134 |
| Deuteranopia (no green cones) | #B8A962 | 0.134 |
| Tritanopia (no blue cones) | #3ABFAC | 0.110 |
| Achromatopsia (no color) | #ADADAD | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C45A
#51C45A
oklch(73% 0.179 144.8)
- #DE7BE5
#DE7BE5
oklch(72.9% 0.18 324.8)
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 #51C45A, closest first.
No curated palette has a color within ΔE 0.04 of #51C45A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.030
- Dark Mint #48C072 ΔE 0.032
- Shamrock Green #02C14D ΔE 0.036
- Dark Mint Green #20C073 ΔE 0.038
- Turtle Green #75B84F ΔE 0.039
- Leafy Green #51B73B ΔE 0.041
- Apple #6ECB3C ΔE 0.041
- Seaweed #18D17B ΔE 0.043
Use #51C45A 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.