#55BFDF
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75.5% 0.107 220.8), rgb(85, 191, 223).
Aa
Black text reads best on this color (9.90:1).
About this color
#55BFDF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.107 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.031 away. Black text reads best on it, at 9.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.90:1 |
| White text | 2.12:1 |
Values
| HEX | #55BFDF |
| RGB | rgb(85, 191, 223) |
| HSL | hsl(194, 68%, 60%) |
| OKLCH | oklch(75.5% 0.107 220.8) |
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 #55BFDF | 2.12:1 | Fails | Lc -45.9 | Large or bold text, headings |
| Black text on #55BFDF | 9.90:1 | AAA | Lc 62.6 | Content text, not long reading |
| #55BFDF text on white | 2.12:1 | Fails | Lc 41.3 | Non-text elements, placeholder text |
| #55BFDF text on black | 9.90:1 | AAA | Lc -60.9 | 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 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
#BFDFEB
oklch(88.4% 0.038 222.5)
-
Step 300
300
#90CBDF
oklch(80.9% 0.067 221)
-
Step 400
400 (this color)
#55BFDF
oklch(75.5% 0.107 220.8)
-
Step 500
500
#0099BA
oklch(63.2% 0.115 220.3)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
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)
#55BFDF 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) | #ACBAE1 | 0.089 |
| Deuteranopia (no green cones) | #98ACDF | 0.079 |
| Tritanopia (no blue cones) | #00C9C9 | 0.058 |
| Achromatopsia (no color) | #B2B2B2 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55BFDF
#55BFDF
oklch(75.5% 0.107 220.8)
- #E9987A
#E9987A
oklch(75.4% 0.107 41.1)
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 #55BFDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.031
- Bright Sky Blue #02CCFE ΔE 0.051
- Deep Sky Blue #00BFFF ΔE 0.052
- Lightblue #7BC8F6 ΔE 0.053
- Dark Turquoise #00CED1 ΔE 0.058
- Light Cornflower Blue #98C1D9 ΔE 0.064
- Turquoise Blue #06B1C4 ΔE 0.065
- Sky Blue #87CEEB ΔE 0.065
Use #55BFDF 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.