#51D09A
Closest named color: Emerald (#06D6A0). oklch(77.3% 0.138 162.1), rgb(81, 208, 154).
Aa
Black text reads best on this color (10.83:1).
About this color
#51D09A is a medium-light, moderately saturated green. In OKLCH its lightness is 77%, its chroma 0.138 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Emerald (#06D6A0), ΔE 0.025 away. Black text reads best on it, at 10.83:1.
| Hue family | Greens |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Emerald (#06D6A0) |
| Black text | 10.83:1 |
| White text | 1.93:1 |
Values
| HEX | #51D09A |
| RGB | rgb(81, 208, 154) |
| HSL | hsl(154, 57%, 57%) |
| OKLCH | oklch(77.3% 0.138 162.1) |
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 #51D09A | 1.93:1 | Fails | Lc -41.2 | Non-text elements, placeholder text |
| Black text on #51D09A | 10.83:1 | AAA | Lc 67.1 | Content text, not long reading |
| #51D09A text on white | 1.93:1 | Fails | Lc 36.8 | Non-text elements, placeholder text |
| #51D09A text on black | 10.83:1 | AAA | Lc -65.6 | Content text, not long reading |
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 300.
-
Step 50
50
#EBFAF2
oklch(97.2% 0.019 162.9)
-
Step 100
100
#D3F3E2
oklch(93.6% 0.04 162.4)
-
Step 200
200
#ACEACA
oklch(88.6% 0.077 161.8)
-
Step 300
300 (this color)
#51D09A
oklch(77.3% 0.138 162.1)
-
Step 400
400
#00BD82
oklch(70.6% 0.155 162.1)
-
Step 500
500
#00A36F
oklch(63.2% 0.139 161.8)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734E
oklch(49.1% 0.107 162.4)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#004F34
oklch(37.8% 0.083 162.1)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#51D09A 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) | #CDC297 | 0.133 |
| Deuteranopia (no green cones) | #BBB59D | 0.128 |
| Tritanopia (no blue cones) | #00D0C1 | 0.056 |
| Achromatopsia (no color) | #BABABA | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D09A
#51D09A
oklch(77.3% 0.138 162.1)
- #F090CD
#F090CD
oklch(77.2% 0.137 342.1)
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 #51D09A, closest first.
No curated palette has a color within ΔE 0.04 of #51D09A.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Emerald #06D6A0 ΔE 0.025
- Medium Aquamarine #66CDAA ΔE 0.032
- Greenblue #23C48B ΔE 0.046
- Soft Green #6FC276 ΔE 0.049
- Seaweed #18D17B ΔE 0.051
- Seafoam Blue #78D1B6 ΔE 0.053
- Aqua Green #12E193 ΔE 0.054
- Green Blue #01C08D ΔE 0.058
Use #51D09A 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.