#51DFDB
Closest named color: Turquoise (#40E0D0). oklch(82.7% 0.12 192.4), rgb(81, 223, 219).
Aa
Black text reads best on this color (12.92:1).
About this color
#51DFDB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.120 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.020 away. Black text reads best on it, at 12.92:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.92:1 |
| White text | 1.62:1 |
Values
| HEX | #51DFDB |
| RGB | rgb(81, 223, 219) |
| HSL | hsl(178, 69%, 60%) |
| OKLCH | oklch(82.7% 0.12 192.4) |
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 #51DFDB | 1.62:1 | Fails | Lc -31.1 | Non-text elements, placeholder text |
| Black text on #51DFDB | 12.92:1 | AAA | Lc 76.2 | Fine for body text |
| #51DFDB text on white | 1.62:1 | Fails | Lc 27.6 | Dividers and decoration only |
| #51DFDB text on black | 12.92:1 | AAA | Lc -75.4 | 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
#EAF9F8
oklch(97.1% 0.016 192.1)
-
Step 100
100
#D0F2F0
oklch(93.6% 0.035 192.2)
-
Step 200
200
#A5E8E5
oklch(88.6% 0.067 192.5)
-
Step 300
300 (this color)
#51DFDB
oklch(82.7% 0.12 192.4)
-
Step 400
400
#00B8B4
oklch(70.7% 0.121 192)
-
Step 500
500
#009E9B
oklch(63.2% 0.108 192.4)
-
Step 600
600
#008582
oklch(55.7% 0.096 192)
-
Step 700
700
#006F6D
oklch(49% 0.084 192.6)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#51DFDB 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) | #D2D4DB | 0.127 |
| Deuteranopia (no green cones) | #BCC4DC | 0.118 |
| Tritanopia (no blue cones) | #00E5DD | 0.024 |
| Achromatopsia (no color) | #CBCBCB | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51DFDB
#51DFDB
oklch(82.7% 0.12 192.4)
- #FFACB5
#FFACB5
oklch(82.7% 0.098 12.3)
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 #51DFDB, closest first.
No curated palette has a color within ΔE 0.04 of #51DFDB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.020
- Aqua Blue #02D8E9 ΔE 0.040
- Medium Turquoise #48D1CC ΔE 0.041
- Seafoam Blue #78D1B6 ΔE 0.054
- Dark Turquoise #00CED1 ΔE 0.057
- Robin's Egg #6DEDFD ΔE 0.060
- Aqua Marine #2EE8BB ΔE 0.061
- Tiffany Blue #94D2BD ΔE 0.061
Use #51DFDB 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.