#51B45F
Closest named color: Dark Pastel Green (#56AE57). oklch(69% 0.153 146.5), rgb(81, 180, 95).
Aa
Black text reads best on this color (8.04:1).
About this color
#51B45F is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.153 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Pastel Green (#56AE57), ΔE 0.017 away. Black text reads best on it, at 8.04:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.153) |
| Temperature | in between |
| Nearest name | Dark Pastel Green (#56AE57) |
| Black text | 8.04:1 |
| White text | 2.61:1 |
Values
| HEX | #51B45F |
| RGB | rgb(81, 180, 95) |
| HSL | hsl(128, 40%, 51%) |
| OKLCH | oklch(69% 0.153 146.5) |
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 #51B45F | 2.61:1 | Fails | Lc -55.8 | Large or bold text, headings |
| Black text on #51B45F | 8.04:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #51B45F text on white | 2.61:1 | Fails | Lc 50.7 | Large or bold text, headings |
| #51B45F text on black | 8.04:1 | AAA | Lc -51.2 | 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
#F0F8F0
oklch(97.1% 0.014 145.5)
-
Step 100
100
#DFEFDF
oklch(93.6% 0.027 145.4)
-
Step 200
200
#C3E3C5
oklch(88.4% 0.053 146.8)
-
Step 300
300
#98D29C
oklch(81% 0.096 146.3)
-
Step 400
400 (this color)
#51B45F
oklch(69% 0.153 146.5)
-
Step 500
500
#00A638
oklch(63.1% 0.19 146.5)
-
Step 600
600
#008C2E
oklch(55.7% 0.168 146.5)
-
Step 700
700
#007525
oklch(49% 0.148 146.5)
-
Step 800
800
#00601D
oklch(42.6% 0.128 146.5)
-
Step 900
900
#005017
oklch(37.6% 0.113 146.6)
-
Step 950
950
#00300B
oklch(26.9% 0.08 146.8)
#51B45F 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) | #B6A658 | 0.119 |
| Deuteranopia (no green cones) | #A99D65 | 0.118 |
| Tritanopia (no blue cones) | #3EB0A0 | 0.091 |
| Achromatopsia (no color) | #A0A0A0 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B45F
#51B45F
oklch(69% 0.153 146.5)
- #CC76CD
#CC76CD
oklch(69% 0.154 326.7)
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 #51B45F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Pastel Green #56AE57 ΔE 0.017
- Cool Green #33B864 ΔE 0.018
- Boring Green #63B365 ΔE 0.018
- Medium Sea Green #3CB371 ΔE 0.025
- Algae #54AC68 ΔE 0.029
- Fern #63A950 ΔE 0.031
- Jade Green #2BAF6A ΔE 0.032
- Seaweed Green #35AD6B ΔE 0.034
Use #51B45F 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.