#66ABC5
Closest named color: Greyblue (#77A1B5). oklch(70.5% 0.079 224.3), rgb(102, 171, 197).
Aa
Black text reads best on this color (8.19:1).
About this color
#66ABC5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.079 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.032 away. Black text reads best on it, at 8.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.19:1 |
| White text | 2.56:1 |
Values
| HEX | #66ABC5 |
| RGB | rgb(102, 171, 197) |
| HSL | hsl(196, 45%, 59%) |
| OKLCH | oklch(70.5% 0.079 224.3) |
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 #66ABC5 | 2.56:1 | Fails | Lc -55.1 | Large or bold text, headings |
| Black text on #66ABC5 | 8.19:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #66ABC5 text on white | 2.56:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #66ABC5 text on black | 8.19:1 | AAA | Lc -51.9 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DDE7
oklch(88.4% 0.027 226.8)
-
Step 300
300
#9FC8D9
oklch(80.9% 0.05 225.1)
-
Step 400
400 (this color)
#66ABC5
oklch(70.5% 0.079 224.3)
-
Step 500
500
#3396B7
oklch(63% 0.102 224.4)
-
Step 600
600
#0080A1
oklch(55.7% 0.105 224.1)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#0B495C
oklch(37.8% 0.066 224.3)
-
Step 950
950
#0A2B36
oklch(27.1% 0.042 224)
#66ABC5 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) | #9CA8C6 | 0.062 |
| Deuteranopia (no green cones) | #8E9DC5 | 0.056 |
| Tritanopia (no blue cones) | #35B3B3 | 0.054 |
| Achromatopsia (no color) | #A2A2A2 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66ABC5
#66ABC5
oklch(70.5% 0.079 224.3)
- #CB9077
#CB9077
oklch(70.5% 0.08 43.9)
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 #66ABC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.041
- Bluey Grey #89A0B0 ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.049
- Cool Steel #97A7B3 ΔE 0.057
- Cadet Blue #5F9EA0 ΔE 0.059
- Cool Gray #8D99AE ΔE 0.062
- Cool Grey #95A3A6 ΔE 0.063
Use #66ABC5 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.