#51C454
Closest named color: Shamrock Green (#02C14D). oklch(73% 0.184 143.8), rgb(81, 196, 84).
Aa
Black text reads best on this color (9.37:1).
About this color
#51C454 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.184 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock Green (#02C14D), ΔE 0.033 away. Black text reads best on it, at 9.37:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.184) |
| Temperature | in between |
| Nearest name | Shamrock Green (#02C14D) |
| Black text | 9.37:1 |
| White text | 2.24:1 |
Values
| HEX | #51C454 |
| RGB | rgb(81, 196, 84) |
| HSL | hsl(122, 49%, 54%) |
| OKLCH | oklch(73% 0.184 143.8) |
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 #51C454 | 2.24:1 | Fails | Lc -48.6 | Large or bold text, headings |
| Black text on #51C454 | 9.37:1 | AAA | Lc 60.2 | Content text, not long reading |
| #51C454 text on white | 2.24:1 | Fails | Lc 43.8 | Non-text elements, placeholder text |
| #51C454 text on black | 9.37:1 | AAA | Lc -58.4 | 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
#DDF0DC
oklch(93.6% 0.033 143.9)
-
Step 200
200
#C0E5BF
oklch(88.5% 0.064 144.3)
-
Step 300
300
#92D490
oklch(80.8% 0.116 143.7)
-
Step 400
400 (this color)
#51C454
oklch(73% 0.184 143.8)
-
Step 500
500
#00A71F
oklch(63.2% 0.206 143.8)
-
Step 600
600
#008C18
oklch(55.5% 0.181 143.8)
-
Step 700
700
#007613
oklch(49.1% 0.16 143.8)
-
Step 800
800
#00610E
oklch(42.8% 0.139 143.9)
-
Step 900
900
#00510A
oklch(37.7% 0.123 143.9)
-
Step 950
950
#003004
oklch(26.8% 0.087 144)
#51C454 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) | #C8B349 | 0.137 |
| Deuteranopia (no green cones) | #B9A95D | 0.136 |
| Tritanopia (no blue cones) | #3CBFAB | 0.115 |
| Achromatopsia (no color) | #ADADAD | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51C454
#51C454
oklch(73% 0.184 143.8)
- #DE7AE8
#DE7AE8
oklch(72.9% 0.184 323.8)
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 #51C454, closest first.
No curated palette has a color within ΔE 0.04 of #51C454.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock Green #02C14D ΔE 0.033
- Algae Green #21C36F ΔE 0.034
- Apple #6ECB3C ΔE 0.038
- Dark Mint #48C072 ΔE 0.038
- Leafy Green #51B73B ΔE 0.038
- Turtle Green #75B84F ΔE 0.041
- Dark Mint Green #20C073 ΔE 0.043
- Frog Green #58BC08 ΔE 0.043
Use #51C454 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.