#51BF89
Closest named color: Greenblue (#23C48B). oklch(72.6% 0.129 159.2), rgb(81, 191, 137).
Aa
Black text reads best on this color (9.16:1).
About this color
#51BF89 is a medium-light, moderately saturated green. In OKLCH its lightness is 73%, its chroma 0.129 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.024 away. Black text reads best on it, at 9.16:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.16:1 |
| White text | 2.29:1 |
Values
| HEX | #51BF89 |
| RGB | rgb(81, 191, 137) |
| HSL | hsl(151, 46%, 53%) |
| OKLCH | oklch(72.6% 0.129 159.2) |
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 #51BF89 | 2.29:1 | Fails | Lc -49.8 | Large or bold text, headings |
| Black text on #51BF89 | 9.16:1 | AAA | Lc 59.1 | Large or bold text, headings |
| #51BF89 text on white | 2.29:1 | Fails | Lc 44.9 | Non-text elements, placeholder text |
| #51BF89 text on black | 9.16:1 | AAA | Lc -57.2 | 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
#F0F8F3
oklch(97.2% 0.011 158.8)
-
Step 100
100
#DDEFE4
oklch(93.6% 0.024 159.1)
-
Step 200
200
#C1E3CF
oklch(88.6% 0.045 159.5)
-
Step 300
300
#93D1AE
oklch(80.9% 0.081 159.2)
-
Step 400
400 (this color)
#51BF89
oklch(72.6% 0.129 159.2)
-
Step 500
500
#00A369
oklch(63.1% 0.144 159.3)
-
Step 600
600
#008957
oklch(55.5% 0.128 159.1)
-
Step 700
700
#007349
oklch(49% 0.112 159.4)
-
Step 800
800
#005F3B
oklch(42.8% 0.098 159.1)
-
Step 900
900
#004F30
oklch(37.7% 0.087 158.9)
-
Step 950
950
#002F1B
oklch(26.9% 0.062 159.3)
#51BF89 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) | #BDB286 | 0.121 |
| Deuteranopia (no green cones) | #AEA78C | 0.118 |
| Tritanopia (no blue cones) | #25BEB0 | 0.057 |
| Achromatopsia (no color) | #ABABAB | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BF89
#51BF89
oklch(72.6% 0.129 159.2)
- #DB85C1
#DB85C1
oklch(72.6% 0.129 339.1)
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 #51BF89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.024
- Green Blue #01C08D ΔE 0.027
- Dark Mint #48C072 ΔE 0.033
- Soft Green #6FC276 ΔE 0.035
- Dark Mint Green #20C073 ΔE 0.042
- Dark Seafoam #1FB57A ΔE 0.045
- Greeny Blue #42B395 ΔE 0.045
- Medium Sea Green #3CB371 ΔE 0.046
Use #51BF89 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.