#51DFD5
Closest named color: Turquoise (#40E0D0). oklch(82.5% 0.121 188.4), rgb(81, 223, 213).
Aa
Black text reads best on this color (12.86:1).
About this color
#51DFD5 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.121 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.012 away. Black text reads best on it, at 12.86:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.86:1 |
| White text | 1.63:1 |
Values
| HEX | #51DFD5 |
| RGB | rgb(81, 223, 213) |
| HSL | hsl(176, 69%, 60%) |
| OKLCH | oklch(82.5% 0.121 188.4) |
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 #51DFD5 | 1.63:1 | Fails | Lc -31.4 | Non-text elements, placeholder text |
| Black text on #51DFD5 | 12.86:1 | AAA | Lc 76.0 | Fine for body text |
| #51DFD5 text on white | 1.63:1 | Fails | Lc 27.8 | Dividers and decoration only |
| #51DFD5 text on black | 12.86:1 | AAA | Lc -75.1 | 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
#EAF9F7
oklch(97% 0.016 187.3)
-
Step 100
100
#D1F2EE
oklch(93.6% 0.035 187.7)
-
Step 200
200
#A6E8E2
oklch(88.5% 0.067 189)
-
Step 300
300 (this color)
#51DFD5
oklch(82.5% 0.121 188.4)
-
Step 400
400
#00B9AF
oklch(70.8% 0.123 188)
-
Step 500
500
#009E96
oklch(63% 0.109 188.5)
-
Step 600
600
#00857E
oklch(55.6% 0.097 188.3)
-
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
#004C48
oklch(37.6% 0.065 188.7)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#51DFD5 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) | #D3D4D5 | 0.128 |
| Deuteranopia (no green cones) | #BEC4D6 | 0.121 |
| Tritanopia (no blue cones) | #00E4DC | 0.023 |
| Achromatopsia (no color) | #CACACA | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51DFD5
#51DFD5
oklch(82.5% 0.121 188.4)
- #FFABB9
#FFABB9
oklch(82.6% 0.1 8.6)
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 #51DFD5, closest first.
No curated palette has a color within ΔE 0.04 of #51DFD5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.012
- Medium Turquoise #48D1CC ΔE 0.040
- Aqua Blue #02D8E9 ΔE 0.045
- Seafoam Blue #78D1B6 ΔE 0.049
- Aqua Marine #2EE8BB ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.057
- Light Teal #90E4C1 ΔE 0.057
- Tiffany Blue #94D2BD ΔE 0.059
Use #51DFD5 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.