#66A2CC
Closest named color: Greyblue (#77A1B5). oklch(68.8% 0.088 240.3), rgb(102, 162, 204).
Aa
Black text reads best on this color (7.60:1).
About this color
#66A2CC is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.088 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.037 away. Black text reads best on it, at 7.60:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.60:1 |
| White text | 2.76:1 |
Values
| HEX | #66A2CC |
| RGB | rgb(102, 162, 204) |
| HSL | hsl(205, 50%, 60%) |
| OKLCH | oklch(68.8% 0.088 240.3) |
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 #66A2CC | 2.76:1 | Fails | Lc -58.4 | Large or bold text, headings |
| Black text on #66A2CC | 7.60:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #66A2CC text on white | 2.76:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #66A2CC text on black | 7.60:1 | AAA | Lc -48.7 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E1
oklch(80.9% 0.055 240)
-
Step 400
400 (this color)
#66A2CC
oklch(68.8% 0.088 240.3)
-
Step 500
500
#3F92C7
oklch(63.2% 0.113 240.1)
-
Step 600
600
#137BB3
oklch(55.6% 0.122 240.1)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#09547D
oklch(42.6% 0.095 240.6)
-
Step 900
900
#154664
oklch(37.7% 0.073 240)
-
Step 950
950
#0E293B
oklch(27% 0.047 240.8)
#66A2CC 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) | #90A2CE | 0.049 |
| Deuteranopia (no green cones) | #8297CB | 0.041 |
| Tritanopia (no blue cones) | #31ACB0 | 0.071 |
| Achromatopsia (no color) | #9C9C9C | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A2CC
#66A2CC
oklch(68.8% 0.088 240.3)
- #C38E61
#C38E61
oklch(68.8% 0.088 60.9)
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 #66A2CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.037
- Bluegrey #85A3B2 ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.053
- Cool Gray #8D99AE ΔE 0.058
- Faded Blue #658CBB ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.065
- Cadet Blue #5F9EA0 ΔE 0.066
- Silver Lake Blue #778DA9 ΔE 0.067
Use #66A2CC 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.