#51F5DB
Closest named color: Bright Aqua (#0BF9EA). oklch(88% 0.139 180.1), rgb(81, 245, 219).
Aa
Black text reads best on this color (15.43:1).
About this color
#51F5DB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 88%, its chroma 0.139 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.023 away. Black text reads best on it, at 15.43:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.43:1 |
| White text | 1.36:1 |
Values
| HEX | #51F5DB |
| RGB | rgb(81, 245, 219) |
| HSL | hsl(170, 89%, 64%) |
| OKLCH | oklch(88% 0.139 180.1) |
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 #51F5DB | 1.36:1 | Fails | Lc -19.8 | Dividers and decoration only |
| Black text on #51F5DB | 15.43:1 | AAA | Lc 86.4 | Fine for body text |
| #51F5DB text on white | 1.36:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #51F5DB text on black | 15.43:1 | AAA | Lc -86.3 | 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 200.
-
Step 50
50
#E5FBF6
oklch(97.1% 0.024 180.7)
-
Step 100
100
#C5F6EB
oklch(93.6% 0.052 179.9)
-
Step 200
200 (this color)
#51F5DB
oklch(88% 0.139 180.1)
-
Step 300
300
#00DFC4
oklch(81% 0.147 179.8)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#00A08C
oklch(63.2% 0.115 179.7)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#51F5DB 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) | #EBE7DA | 0.148 |
| Deuteranopia (no green cones) | #D3D6DD | 0.139 |
| Tritanopia (no blue cones) | #00F9ED | 0.027 |
| Achromatopsia (no color) | #DDDDDD | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51F5DB
#51F5DB
oklch(88% 0.139 180.1)
- #FFC5D5
#FFC5D5
oklch(87.9% 0.069 0.4)
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 #51F5DB, closest first.
No curated palette has a color within ΔE 0.04 of #51F5DB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.023
- Light Turquoise #7EF4CC ΔE 0.031
- Bright Turquoise #0FFEF9 ΔE 0.041
- Bright Teal #01F9C6 ΔE 0.041
- Aquamarine #7FFFD4 ΔE 0.045
- Bright Light Blue #26F7FD ΔE 0.046
- Bright Cyan #41FDFE ΔE 0.046
- Light Aquamarine #7BFDC7 ΔE 0.047
Use #51F5DB 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.