#51B2CD
Closest named color: Turquoise Blue (#06B1C4). oklch(71.6% 0.098 218.9), rgb(81, 178, 205).
Aa
Black text reads best on this color (8.59:1).
About this color
#51B2CD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.098 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.035 away. Black text reads best on it, at 8.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.59:1 |
| White text | 2.44:1 |
Values
| HEX | #51B2CD |
| RGB | rgb(81, 178, 205) |
| HSL | hsl(193, 55%, 56%) |
| OKLCH | oklch(71.6% 0.098 218.9) |
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 #51B2CD | 2.44:1 | Fails | Lc -52.8 | Large or bold text, headings |
| Black text on #51B2CD | 8.59:1 | AAA | Lc 56.2 | Large or bold text, headings |
| #51B2CD text on white | 2.44:1 | Fails | Lc 47.8 | Large or bold text, headings |
| #51B2CD text on black | 8.59:1 | AAA | Lc -54.2 | Large or bold text, headings |
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 400.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF2
oklch(93.6% 0.017 219.7)
-
Step 200
200
#C1DFE9
oklch(88.5% 0.035 219.9)
-
Step 300
300
#94CBDC
oklch(81% 0.062 218.9)
-
Step 400
400 (this color)
#51B2CD
oklch(71.6% 0.098 218.9)
-
Step 500
500
#0099B8
oklch(63.1% 0.114 219)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586B
oklch(42.5% 0.077 219.1)
-
Step 900
900
#004A5A
oklch(37.8% 0.068 218.5)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#51B2CD 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) | #A1ADCE | 0.084 |
| Deuteranopia (no green cones) | #8FA0CD | 0.075 |
| Tritanopia (no blue cones) | #00BBBA | 0.053 |
| Achromatopsia (no color) | #A6A6A6 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B2CD
#51B2CD
oklch(71.6% 0.098 218.9)
- #D98E75
#D98E75
oklch(71.7% 0.099 39.2)
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 #51B2CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.035
- Greyblue #77A1B5 ΔE 0.055
- Light Sea Green #20B2AA ΔE 0.062
- Bluegrey #85A3B2 ΔE 0.062
- Topaz #13BBAF ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.070
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Deep Sky Blue #00BFFF ΔE 0.073
Use #51B2CD 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.