#51DDAE
Closest named color: Aqua Marine (#2EE8BB). oklch(81% 0.139 167.1), rgb(81, 221, 174).
Aa
Black text reads best on this color (12.30:1).
About this color
#51DDAE is a light, moderately saturated green. In OKLCH its lightness is 81%, its chroma 0.139 and its hue 167°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.030 away. Black text reads best on it, at 12.30:1.
| Hue family | Greens |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.139) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.30:1 |
| White text | 1.70:1 |
Values
| HEX | #51DDAE |
| RGB | rgb(81, 221, 174) |
| HSL | hsl(160, 67%, 59%) |
| OKLCH | oklch(81% 0.139 167.1) |
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 #51DDAE | 1.70:1 | Fails | Lc -34.0 | Non-text elements, placeholder text |
| Black text on #51DDAE | 12.30:1 | AAA | Lc 73.6 | Content text, not long reading |
| #51DDAE text on white | 1.70:1 | Fails | Lc 30.2 | Non-text elements, placeholder text |
| #51DDAE text on black | 12.30:1 | AAA | Lc -72.5 | 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
#EAFAF3
oklch(97.1% 0.019 167.9)
-
Step 100
100
#D1F3E4
oklch(93.6% 0.041 167)
-
Step 200
200
#A7EACF
oklch(88.5% 0.077 167.7)
-
Step 300
300 (this color)
#51DDAE
oklch(81% 0.139 167.1)
-
Step 400
400
#00BC8E
oklch(70.6% 0.144 167.5)
-
Step 500
500
#00A279
oklch(63.2% 0.13 167)
-
Step 600
600
#008865
oklch(55.6% 0.114 167)
-
Step 700
700
#007255
oklch(49% 0.1 167.6)
-
Step 800
800
#005E45
oklch(42.8% 0.088 167.1)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#51DDAE 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) | #D8CEAC | 0.140 |
| Deuteranopia (no green cones) | #C5C0B1 | 0.135 |
| Tritanopia (no blue cones) | #00DED0 | 0.048 |
| Achromatopsia (no color) | #C6C6C6 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51DDAE
#51DDAE
oklch(81% 0.139 167.1)
- #FF9CD1
#FF9CD1
oklch(80.9% 0.133 347.2)
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 #51DDAE, closest first.
No curated palette has a color within ΔE 0.04 of #51DDAE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.030
- Emerald #06D6A0 ΔE 0.038
- Medium Aquamarine #66CDAA ΔE 0.044
- Turquoise #40E0D0 ΔE 0.045
- Seafoam Blue #78D1B6 ΔE 0.047
- Aqua Green #12E193 ΔE 0.049
- Pale Teal #82CBB2 ΔE 0.062
- Medium Turquoise #48D1CC ΔE 0.063
Use #51DDAE 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.