#51CBD2
Closest named color: Medium Turquoise (#48D1CC). oklch(77.7% 0.108 200.5), rgb(81, 203, 210).
Aa
Black text reads best on this color (10.82:1).
About this color
#51CBD2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 78%, its chroma 0.108 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.022 away. Black text reads best on it, at 10.82:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (78%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 10.82:1 |
| White text | 1.94:1 |
Values
| HEX | #51CBD2 |
| RGB | rgb(81, 203, 210) |
| HSL | hsl(183, 59%, 57%) |
| OKLCH | oklch(77.7% 0.108 200.5) |
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 #51CBD2 | 1.94:1 | Fails | Lc -41.3 | Non-text elements, placeholder text |
| Black text on #51CBD2 | 10.82:1 | AAA | Lc 67.0 | Content text, not long reading |
| #51CBD2 text on white | 1.94:1 | Fails | Lc 36.9 | Non-text elements, placeholder text |
| #51CBD2 text on black | 10.82:1 | AAA | Lc -65.5 | 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
#EBF9F9
oklch(97.2% 0.015 196.9)
-
Step 100
100
#D3F1F2
oklch(93.7% 0.031 199.1)
-
Step 200
200
#ABE6E9
oklch(88.6% 0.06 200.1)
-
Step 300
300 (this color)
#51CBD2
oklch(77.7% 0.108 200.5)
-
Step 400
400
#00B6BF
oklch(70.6% 0.12 201.1)
-
Step 500
500
#009CA3
oklch(63% 0.107 200.4)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006F74
oklch(49.2% 0.084 200.3)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#51CBD2 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) | #BDC3D3 | 0.109 |
| Deuteranopia (no green cones) | #A9B4D3 | 0.101 |
| Tritanopia (no blue cones) | #00D2CD | 0.032 |
| Achromatopsia (no color) | #BABABA | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51CBD2
#51CBD2
oklch(77.7% 0.108 200.5)
- #F49A99
#F49A99
oklch(77.7% 0.108 20.5)
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 #51CBD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.022
- Dark Turquoise #00CED1 ΔE 0.026
- Aqua Blue #02D8E9 ΔE 0.042
- Vivid Sky Blue #4CC9F0 ΔE 0.046
- Seafoam Blue #78D1B6 ΔE 0.055
- Pale Teal #82CBB2 ΔE 0.056
- Medium Aquamarine #66CDAA ΔE 0.059
- Turquoise #40E0D0 ΔE 0.060
Use #51CBD2 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.