#51D3BF
Closest named color: Medium Turquoise (#48D1CC). oklch(79% 0.117 181.2), rgb(81, 211, 191).
Aa
Black text reads best on this color (11.41:1).
About this color
#51D3BF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.117 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.021 away. Black text reads best on it, at 11.41:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.41:1 |
| White text | 1.83:1 |
Values
| HEX | #51D3BF |
| RGB | rgb(81, 211, 191) |
| HSL | hsl(171, 60%, 57%) |
| OKLCH | oklch(79% 0.117 181.2) |
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 #51D3BF | 1.83:1 | Fails | Lc -38.3 | Non-text elements, placeholder text |
| Black text on #51D3BF | 11.41:1 | AAA | Lc 69.7 | Content text, not long reading |
| #51D3BF text on white | 1.83:1 | Fails | Lc 34.2 | Non-text elements, placeholder text |
| #51D3BF text on black | 11.41:1 | AAA | Lc -68.4 | 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
#EBF9F6
oklch(97.1% 0.015 181.8)
-
Step 100
100
#D2F2EB
oklch(93.6% 0.035 180.9)
-
Step 200
200
#AAE8DC
oklch(88.6% 0.065 181.5)
-
Step 300
300 (this color)
#51D3BF
oklch(79% 0.117 181.2)
-
Step 400
400
#00BAA5
oklch(70.7% 0.128 180.9)
-
Step 500
500
#009F8E
oklch(63% 0.113 181.8)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#51D3BF 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) | #CAC7BE | 0.124 |
| Deuteranopia (no green cones) | #B7B9C1 | 0.119 |
| Tritanopia (no blue cones) | #00D7CD | 0.026 |
| Achromatopsia (no color) | #BFBFBF | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D3BF
#51D3BF
oklch(79% 0.117 181.2)
- #F99AB6
#F99AB6
oklch(79.1% 0.118 1.1)
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 #51D3BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.021
- Seafoam Blue #78D1B6 ΔE 0.029
- Medium Aquamarine #66CDAA ΔE 0.029
- Turquoise #40E0D0 ΔE 0.036
- Pale Teal #82CBB2 ΔE 0.040
- Dark Turquoise #00CED1 ΔE 0.040
- Tiffany Blue #94D2BD ΔE 0.056
- Emerald #06D6A0 ΔE 0.056
Use #51D3BF 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.