#51DBB5
Closest named color: Aqua Marine (#2EE8BB). oklch(80.6% 0.132 171.4), rgb(81, 219, 181).
Aa
Black text reads best on this color (12.14:1).
About this color
#51DBB5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.132 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.035 away. Black text reads best on it, at 12.14:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.14:1 |
| White text | 1.72:1 |
Values
| HEX | #51DBB5 |
| RGB | rgb(81, 219, 181) |
| HSL | hsl(163, 66%, 59%) |
| OKLCH | oklch(80.6% 0.132 171.4) |
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 #51DBB5 | 1.72:1 | Fails | Lc -34.8 | Non-text elements, placeholder text |
| Black text on #51DBB5 | 12.14:1 | AAA | Lc 72.9 | Content text, not long reading |
| #51DBB5 text on white | 1.72:1 | Fails | Lc 30.9 | Non-text elements, placeholder text |
| #51DBB5 text on black | 12.14:1 | AAA | Lc -71.8 | 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
#EAFAF4
oklch(97.2% 0.019 171.5)
-
Step 100
100
#D2F3E7
oklch(93.7% 0.038 171.5)
-
Step 200
200
#A8E9D3
oklch(88.4% 0.072 171.6)
-
Step 300
300 (this color)
#51DBB5
oklch(80.6% 0.132 171.4)
-
Step 400
400
#00BC96
oklch(70.8% 0.138 171.4)
-
Step 500
500
#00A180
oklch(63.1% 0.123 171.4)
-
Step 600
600
#00876B
oklch(55.5% 0.108 171.4)
-
Step 700
700
#00725A
oklch(49.2% 0.096 171.5)
-
Step 800
800
#005D49
oklch(42.6% 0.083 171.6)
-
Step 900
900
#004E3D
oklch(37.8% 0.073 171.8)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#51DBB5 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) | #D5CDB3 | 0.136 |
| Deuteranopia (no green cones) | #C1BFB8 | 0.130 |
| Tritanopia (no blue cones) | #00DDD0 | 0.039 |
| Achromatopsia (no color) | #C5C5C5 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51DBB5
#51DBB5
oklch(80.6% 0.132 171.4)
- #FF9CC9
#FF9CC9
oklch(80.6% 0.129 351.6)
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 #51DBB5, closest first.
No curated palette has a color within ΔE 0.04 of #51DBB5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.035
- Turquoise #40E0D0 ΔE 0.035
- Medium Aquamarine #66CDAA ΔE 0.037
- Seafoam Blue #78D1B6 ΔE 0.038
- Emerald #06D6A0 ΔE 0.042
- Medium Turquoise #48D1CC ΔE 0.050
- Pale Teal #82CBB2 ΔE 0.053
- Aqua Green #12E193 ΔE 0.060
Use #51DBB5 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.