#55B5BB
Closest named color: Turquoise Blue (#06B1C4). oklch(71.8% 0.09 200.9), rgb(85, 181, 187).
Aa
Black text reads best on this color (8.71:1).
About this color
#55B5BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.090 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.038 away. Black text reads best on it, at 8.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.71:1 |
| White text | 2.41:1 |
Values
| HEX | #55B5BB |
| RGB | rgb(85, 181, 187) |
| HSL | hsl(184, 43%, 53%) |
| OKLCH | oklch(71.8% 0.09 200.9) |
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 #55B5BB | 2.41:1 | Fails | Lc -52.2 | Large or bold text, headings |
| Black text on #55B5BB | 8.71:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #55B5BB text on white | 2.41:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #55B5BB text on black | 8.71:1 | AAA | Lc -54.8 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DEEDEE
oklch(93.5% 0.016 201.7)
-
Step 200
200
#C2E0E2
oklch(88.5% 0.032 201.5)
-
Step 300
300
#96CCCF
oklch(80.9% 0.056 200.4)
-
Step 400
400 (this color)
#55B5BB
oklch(71.8% 0.09 200.9)
-
Step 500
500
#009CA4
oklch(63% 0.107 201.2)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005B5F
oklch(42.8% 0.073 200)
-
Step 900
900
#004B4F
oklch(37.5% 0.064 200.9)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#55B5BB 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) | #A9AEBC | 0.092 |
| Deuteranopia (no green cones) | #99A2BC | 0.085 |
| Tritanopia (no blue cones) | #00BBB7 | 0.036 |
| Achromatopsia (no color) | #A7A7A7 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55B5BB
#55B5BB
oklch(71.8% 0.09 200.9)
- #D78D8C
#D78D8C
oklch(71.8% 0.091 20.4)
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 #55B5BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.038
- Light Sea Green #20B2AA ΔE 0.041
- Topaz #13BBAF ΔE 0.042
- Greeny Blue #42B395 ΔE 0.059
- Greyblue #77A1B5 ΔE 0.059
- Bluegrey #85A3B2 ΔE 0.062
- Cadet Blue #5F9EA0 ΔE 0.065
- Dark Turquoise #00CED1 ΔE 0.068
Use #55B5BB 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.