#51BAD2
Closest named color: Turquoise Blue (#06B1C4). oklch(73.7% 0.102 215.3), rgb(81, 186, 210).
Aa
Black text reads best on this color (9.30:1).
About this color
#51BAD2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.102 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.046 away. Black text reads best on it, at 9.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.30:1 |
| White text | 2.25:1 |
Values
| HEX | #51BAD2 |
| RGB | rgb(81, 186, 210) |
| HSL | hsl(191, 59%, 57%) |
| OKLCH | oklch(73.7% 0.102 215.3) |
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 #51BAD2 | 2.25:1 | Fails | Lc -49.0 | Large or bold text, headings |
| Black text on #51BAD2 | 9.30:1 | AAA | Lc 59.7 | Large or bold text, headings |
| #51BAD2 text on white | 2.25:1 | Fails | Lc 44.2 | Non-text elements, placeholder text |
| #51BAD2 text on black | 9.30:1 | AAA | Lc -57.9 | 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
#EFF7F9
oklch(97.1% 0.009 214.3)
-
Step 100
100
#DDEDF2
oklch(93.6% 0.018 218.4)
-
Step 200
200
#C0E0E8
oklch(88.6% 0.035 214.5)
-
Step 300
300
#91CCDA
oklch(81% 0.063 214.1)
-
Step 400
400 (this color)
#51BAD2
oklch(73.7% 0.102 215.3)
-
Step 500
500
#009AB4
oklch(63.2% 0.112 215.3)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#51BAD2 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) | #A9B5D3 | 0.090 |
| Deuteranopia (no green cones) | #96A6D2 | 0.083 |
| Tritanopia (no blue cones) | #00C3C1 | 0.050 |
| Achromatopsia (no color) | #ACACAC | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51BAD2
#51BAD2
oklch(73.7% 0.102 215.3)
- #E2927E
#E2927E
oklch(73.6% 0.102 34.7)
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 #51BAD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.046
- Vivid Sky Blue #4CC9F0 ΔE 0.052
- Dark Turquoise #00CED1 ΔE 0.059
- Topaz #13BBAF ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.065
- Light Sea Green #20B2AA ΔE 0.068
- Medium Turquoise #48D1CC ΔE 0.069
- Bright Sky Blue #02CCFE ΔE 0.069
Use #51BAD2 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.