#51D8CF
Closest named color: Medium Turquoise (#48D1CC). oklch(80.7% 0.117 188.9), rgb(81, 216, 207).
Aa
Black text reads best on this color (12.07:1).
About this color
#51D8CF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.117 and its hue 189°. 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 12.07:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 12.07:1 |
| White text | 1.73:1 |
Values
| HEX | #51D8CF |
| RGB | rgb(81, 216, 207) |
| HSL | hsl(176, 63%, 58%) |
| OKLCH | oklch(80.7% 0.117 188.9) |
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 #51D8CF | 1.73:1 | Fails | Lc -35.2 | Non-text elements, placeholder text |
| Black text on #51D8CF | 12.07:1 | AAA | Lc 72.6 | Content text, not long reading |
| #51D8CF text on white | 1.73:1 | Fails | Lc 31.3 | Non-text elements, placeholder text |
| #51D8CF text on black | 12.07:1 | AAA | Lc -71.5 | 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
#EAF9F7
oklch(97% 0.016 187.3)
-
Step 100
100
#D2F2EE
oklch(93.7% 0.034 187.4)
-
Step 200
200
#A8E8E2
oklch(88.6% 0.065 188.8)
-
Step 300
300 (this color)
#51D8CF
oklch(80.7% 0.117 188.9)
-
Step 400
400
#00B8B0
oklch(70.6% 0.122 189.3)
-
Step 500
500
#009E97
oklch(63.1% 0.109 189.2)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C49
oklch(37.6% 0.065 190.2)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#51D8CF 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) | #CDCDCF | 0.124 |
| Deuteranopia (no green cones) | #B8BED0 | 0.116 |
| Tritanopia (no blue cones) | #00DDD5 | 0.023 |
| Achromatopsia (no color) | #C4C4C4 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D8CF
#51D8CF
oklch(80.7% 0.117 188.9)
- #FFA1B1
#FFA1B1
oklch(80.7% 0.113 8.8)
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 #51D8CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.021
- Turquoise #40E0D0 ΔE 0.022
- Seafoam Blue #78D1B6 ΔE 0.039
- Aqua Blue #02D8E9 ΔE 0.041
- Dark Turquoise #00CED1 ΔE 0.041
- Medium Aquamarine #66CDAA ΔE 0.050
- Pale Teal #82CBB2 ΔE 0.051
- Tiffany Blue #94D2BD ΔE 0.055
Use #51D8CF 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.