#55ADD2
Closest named color: Turquoise Blue (#06B1C4). oklch(70.8% 0.1 228.2), rgb(85, 173, 210).
Aa
Black text reads best on this color (8.29:1).
About this color
#55ADD2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.100 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.044 away. Black text reads best on it, at 8.29:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.29:1 |
| White text | 2.53:1 |
Values
| HEX | #55ADD2 |
| RGB | rgb(85, 173, 210) |
| HSL | hsl(198, 58%, 58%) |
| OKLCH | oklch(70.8% 0.1 228.2) |
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 #55ADD2 | 2.53:1 | Fails | Lc -54.5 | Large or bold text, headings |
| Black text on #55ADD2 | 8.29:1 | AAA | Lc 54.6 | Large or bold text, headings |
| #55ADD2 text on white | 2.53:1 | Fails | Lc 49.4 | Large or bold text, headings |
| #55ADD2 text on black | 8.29:1 | AAA | Lc -52.5 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEEDF4
oklch(93.7% 0.019 227.3)
-
Step 200
200
#C2DEEB
oklch(88.4% 0.035 227.5)
-
Step 300
300
#96C9E1
oklch(80.8% 0.063 228.6)
-
Step 400
400 (this color)
#55ADD2
oklch(70.8% 0.1 228.2)
-
Step 500
500
#0097C4
oklch(63.2% 0.123 228.1)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#55ADD2 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) | #9AAAD4 | 0.073 |
| Deuteranopia (no green cones) | #889DD2 | 0.064 |
| Tritanopia (no blue cones) | #00B8B9 | 0.065 |
| Achromatopsia (no color) | #A3A3A3 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55ADD2
#55ADD2
oklch(70.8% 0.1 228.2)
- #D48E69
#D48E69
oklch(70.9% 0.1 48.5)
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 #55ADD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.044
- Greyblue #77A1B5 ΔE 0.051
- Bluegrey #85A3B2 ΔE 0.061
- Bluey Grey #89A0B0 ΔE 0.067
- Deep Sky Blue #00BFFF ΔE 0.072
- Cadet Blue #5F9EA0 ΔE 0.074
- Light Sea Green #20B2AA ΔE 0.075
- Cool Steel #97A7B3 ΔE 0.076
Use #55ADD2 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.