#51E7BB
Closest named color: Aqua Marine (#2EE8BB). oklch(83.7% 0.142 169.7), rgb(81, 231, 187).
Aa
Black text reads best on this color (13.49:1).
About this color
#51E7BB is a light, vivid green. In OKLCH its lightness is 84%, its chroma 0.142 and its hue 170°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.014 away. Black text reads best on it, at 13.49:1.
| Hue family | Greens |
| Lightness | light (84%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 13.49:1 |
| White text | 1.55:1 |
Values
| HEX | #51E7BB |
| RGB | rgb(81, 231, 187) |
| HSL | hsl(162, 76%, 61%) |
| OKLCH | oklch(83.7% 0.142 169.7) |
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 #51E7BB | 1.55:1 | Fails | Lc -28.5 | Dividers and decoration only |
| Black text on #51E7BB | 13.49:1 | AAA | Lc 78.6 | Fine for body text |
| #51E7BB text on white | 1.55:1 | Fails | Lc 25.1 | Dividers and decoration only |
| #51E7BB text on black | 13.49:1 | AAA | Lc -78.0 | Fine for body text |
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
#D0F3E5
oklch(93.5% 0.041 169.3)
-
Step 200
200
#A4EBD1
oklch(88.6% 0.08 169.6)
-
Step 300
300 (this color)
#51E7BB
oklch(83.7% 0.142 169.7)
-
Step 400
400
#00BC93
oklch(70.7% 0.14 169.9)
-
Step 500
500
#00A17D
oklch(63% 0.125 169.6)
-
Step 600
600
#008869
oklch(55.7% 0.111 169.5)
-
Step 700
700
#007258
oklch(49.1% 0.097 169.9)
-
Step 800
800
#005E48
oklch(42.9% 0.085 169.8)
-
Step 900
900
#004E3B
oklch(37.7% 0.075 169.6)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#51E7BB 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) | #E1D8B9 | 0.145 |
| Deuteranopia (no green cones) | #CCC9BE | 0.139 |
| Tritanopia (no blue cones) | #00E8DA | 0.044 |
| Achromatopsia (no color) | #CFCFCF | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51E7BB
#51E7BB
oklch(83.7% 0.142 169.7)
- #FFADD4
#FFADD4
oklch(83.8% 0.107 349.6)
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 #51E7BB, closest first.
No curated palette has a color within ΔE 0.04 of #51E7BB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.014
- Turquoise #40E0D0 ΔE 0.041
- Bright Teal #01F9C6 ΔE 0.047
- Light Teal #90E4C1 ΔE 0.050
- Light Turquoise #7EF4CC ΔE 0.054
- Hospital Green #9BE5AA ΔE 0.057
- Aqua Green #12E193 ΔE 0.060
- Seafoam Blue #78D1B6 ΔE 0.062
Use #51E7BB 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.