#66B2DB
Closest named color: Greyblue (#77A1B5). oklch(73% 0.096 233.8), rgb(102, 178, 219).
Aa
Black text reads best on this color (8.95:1).
About this color
#66B2DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.096 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.062 away. Black text reads best on it, at 8.95:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 8.95:1 |
| White text | 2.34:1 |
Values
| HEX | #66B2DB |
| RGB | rgb(102, 178, 219) |
| HSL | hsl(201, 62%, 63%) |
| OKLCH | oklch(73% 0.096 233.8) |
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 #66B2DB | 2.34:1 | Fails | Lc -51.0 | Large or bold text, headings |
| Black text on #66B2DB | 8.95:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #66B2DB text on white | 2.34:1 | Fails | Lc 46.1 | Large or bold text, headings |
| #66B2DB text on black | 8.95:1 | AAA | Lc -56.0 | 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
#F0F6FA
oklch(97% 0.008 236.6)
-
Step 100
100
#DFECF4
oklch(93.6% 0.018 234.5)
-
Step 200
200
#C5DDEC
oklch(88.4% 0.033 235.2)
-
Step 300
300
#9BC8E2
oklch(81% 0.06 233.8)
-
Step 400
400 (this color)
#66B2DB
oklch(73% 0.096 233.8)
-
Step 500
500
#2195C8
oklch(63.2% 0.123 233.6)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004865
oklch(37.8% 0.079 233.7)
-
Step 950
950
#062A3B
oklch(26.9% 0.05 233.9)
#66B2DB 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) | #9EB0DD | 0.062 |
| Deuteranopia (no green cones) | #8EA4DA | 0.054 |
| Tritanopia (no blue cones) | #12BDBF | 0.074 |
| Achromatopsia (no color) | #A9A9A9 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66B2DB
#66B2DB
oklch(73% 0.096 233.8)
- #D8976D
#D8976D
oklch(73.1% 0.097 53.5)
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 #66B2DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.062
- Vivid Sky Blue #4CC9F0 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.063
- Bluegrey #85A3B2 ΔE 0.065
- Carolina Blue #8AB8FE ΔE 0.067
- Light Grey Blue #9DBCD4 ΔE 0.070
- Lightblue #7BC8F6 ΔE 0.070
Use #66B2DB 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.