#51D5BD
Closest named color: Medium Turquoise (#48D1CC). oklch(79.4% 0.12 178.8), rgb(81, 213, 189).
Aa
Black text reads best on this color (11.60:1).
About this color
#51D5BD is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.120 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.028 away. Black text reads best on it, at 11.60:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 11.60:1 |
| White text | 1.80:1 |
Values
| HEX | #51D5BD |
| RGB | rgb(81, 213, 189) |
| HSL | hsl(169, 61%, 58%) |
| OKLCH | oklch(79.4% 0.12 178.8) |
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 #51D5BD | 1.80:1 | Fails | Lc -37.4 | Non-text elements, placeholder text |
| Black text on #51D5BD | 11.60:1 | AAA | Lc 70.5 | Content text, not long reading |
| #51D5BD text on white | 1.80:1 | Fails | Lc 33.4 | Non-text elements, placeholder text |
| #51D5BD text on black | 11.60:1 | AAA | Lc -69.3 | 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
#EBF9F5
oklch(97.1% 0.016 177.1)
-
Step 100
100
#D2F2EA
oklch(93.6% 0.035 178.8)
-
Step 200
200
#A9E8DA
oklch(88.5% 0.067 179.4)
-
Step 300
300 (this color)
#51D5BD
oklch(79.4% 0.12 178.8)
-
Step 400
400
#00BAA2
oklch(70.6% 0.129 179.1)
-
Step 500
500
#00A08A
oklch(63.2% 0.116 178.3)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D50
oklch(42.8% 0.078 178.9)
-
Step 900
900
#004D42
oklch(37.6% 0.069 179)
-
Step 950
950
#002E27
oklch(27% 0.049 179.5)
#51D5BD 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) | #CDC9BC | 0.127 |
| Deuteranopia (no green cones) | #B9BBBF | 0.120 |
| Tritanopia (no blue cones) | #00D8CE | 0.029 |
| Achromatopsia (no color) | #C0C0C0 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51D5BD
#51D5BD
oklch(79.4% 0.12 178.8)
- #FA9ABA
#FA9ABA
oklch(79.3% 0.12 358.7)
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 #51D5BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.028
- Seafoam Blue #78D1B6 ΔE 0.028
- Medium Aquamarine #66CDAA ΔE 0.029
- Turquoise #40E0D0 ΔE 0.033
- Pale Teal #82CBB2 ΔE 0.042
- Dark Turquoise #00CED1 ΔE 0.046
- Emerald #06D6A0 ΔE 0.052
- Aqua Marine #2EE8BB ΔE 0.055
Use #51D5BD 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.