#55BDDD
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75% 0.106 221.2), rgb(85, 189, 221).
Aa
Black text reads best on this color (9.70:1).
About this color
#55BDDD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.106 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.036 away. Black text reads best on it, at 9.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.70:1 |
| White text | 2.16:1 |
Values
| HEX | #55BDDD |
| RGB | rgb(85, 189, 221) |
| HSL | hsl(194, 67%, 60%) |
| OKLCH | oklch(75% 0.106 221.2) |
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 #55BDDD | 2.16:1 | Fails | Lc -46.9 | Large or bold text, headings |
| Black text on #55BDDD | 9.70:1 | AAA | Lc 61.7 | Content text, not long reading |
| #55BDDD text on white | 2.16:1 | Fails | Lc 42.3 | Non-text elements, placeholder text |
| #55BDDD text on black | 9.70:1 | AAA | Lc -60.0 | 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
#EFF7FA
oklch(97.1% 0.009 222.1)
-
Step 100
100
#DDEDF3
oklch(93.6% 0.019 222.2)
-
Step 200
200
#C0DFEA
oklch(88.5% 0.036 221.2)
-
Step 300
300
#91CBDF
oklch(80.9% 0.066 221.4)
-
Step 400
400 (this color)
#55BDDD
oklch(75% 0.106 221.2)
-
Step 500
500
#0099BB
oklch(63.2% 0.116 221)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C85
oklch(49.2% 0.09 221.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#00495B
oklch(37.6% 0.069 221.4)
-
Step 950
950
#002C37
oklch(27.1% 0.049 219.4)
#55BDDD 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) | #AAB9DF | 0.087 |
| Deuteranopia (no green cones) | #96AADD | 0.078 |
| Tritanopia (no blue cones) | #00C7C7 | 0.058 |
| Achromatopsia (no color) | #B0B0B0 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55BDDD
#55BDDD
oklch(75% 0.106 221.2)
- #E79779
#E79779
oklch(75% 0.106 41.3)
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 #55BDDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.036
- Deep Sky Blue #00BFFF ΔE 0.053
- Bright Sky Blue #02CCFE ΔE 0.055
- Lightblue #7BC8F6 ΔE 0.057
- Dark Turquoise #00CED1 ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.061
- Light Cornflower Blue #98C1D9 ΔE 0.066
- Medium Turquoise #48D1CC ΔE 0.069
Use #55BDDD 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.