#66BBBC
Closest named color: Topaz (#13BBAF). oklch(73.9% 0.083 196.5), rgb(102, 187, 188).
Aa
Black text reads best on this color (9.39:1).
About this color
#66BBBC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.083 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.050 away. Black text reads best on it, at 9.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #66BBBC |
| RGB | rgb(102, 187, 188) |
| HSL | hsl(181, 39%, 57%) |
| OKLCH | oklch(73.9% 0.083 196.5) |
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 #66BBBC | 2.23:1 | Fails | Lc -48.7 | Large or bold text, headings |
| Black text on #66BBBC | 9.39:1 | AAA | Lc 60.1 | Content text, not long reading |
| #66BBBC text on white | 2.23:1 | Fails | Lc 43.9 | Non-text elements, placeholder text |
| #66BBBC text on black | 9.39:1 | AAA | Lc -58.3 | 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
#DFEDED
oklch(93.6% 0.015 196.9)
-
Step 200
200
#C4DFDF
oklch(88.4% 0.029 196.6)
-
Step 300
300
#9ACBCC
oklch(80.8% 0.051 197.8)
-
Step 400
400 (this color)
#66BBBC
oklch(73.9% 0.083 196.5)
-
Step 500
500
#0D9D9F
oklch(63.2% 0.106 196.4)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#032D2E
oklch(27.1% 0.044 197.3)
#66BBBC 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) | #B1B4BC | 0.086 |
| Deuteranopia (no green cones) | #A2A9BD | 0.080 |
| Tritanopia (no blue cones) | #37C0BB | 0.032 |
| Achromatopsia (no color) | #ADADAD | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66BBBC
#66BBBC
oklch(73.9% 0.083 196.5)
- #DA9598
#DA9598
oklch(73.9% 0.084 16.4)
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 #66BBBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.050
- Dark Turquoise #00CED1 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.059
- Light Sea Green #20B2AA ΔE 0.059
- Turquoise Blue #06B1C4 ΔE 0.060
- Pale Teal #82CBB2 ΔE 0.060
- Muted Teal #90B494 ΔE 0.062
- Medium Aquamarine #66CDAA ΔE 0.065
Use #66BBBC 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.