#66A2CB
Closest named color: Greyblue (#77A1B5). oklch(68.7% 0.087 239.6), rgb(102, 162, 203).
Aa
Black text reads best on this color (7.59:1).
About this color
#66A2CB is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.087 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.035 away. Black text reads best on it, at 7.59:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.59:1 |
| White text | 2.76:1 |
Values
| HEX | #66A2CB |
| RGB | rgb(102, 162, 203) |
| HSL | hsl(204, 49%, 60%) |
| OKLCH | oklch(68.7% 0.087 239.6) |
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 #66A2CB | 2.76:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #66A2CB | 7.59:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #66A2CB text on white | 2.76:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #66A2CB text on black | 7.59:1 | AAA | Lc -48.6 | 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DCEB
oklch(88.4% 0.03 240.2)
-
Step 300
300
#A1C6E1
oklch(80.9% 0.055 240)
-
Step 400
400 (this color)
#66A2CB
oklch(68.7% 0.087 239.6)
-
Step 500
500
#4092C6
oklch(63.2% 0.111 239.8)
-
Step 600
600
#137BB2
oklch(55.6% 0.121 239.6)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#09557C
oklch(42.8% 0.093 239)
-
Step 900
900
#154664
oklch(37.7% 0.073 240)
-
Step 950
950
#0E293A
oklch(26.9% 0.046 239.3)
#66A2CB 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) | #90A1CD | 0.049 |
| Deuteranopia (no green cones) | #8297CA | 0.041 |
| Tritanopia (no blue cones) | #32ACB0 | 0.069 |
| Achromatopsia (no color) | #9B9B9B | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66A2CB
#66A2CB
oklch(68.7% 0.087 239.6)
- #C38E63
#C38E63
oklch(68.9% 0.087 59.7)
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 #66A2CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.035
- Bluegrey #85A3B2 ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.052
- Cool Gray #8D99AE ΔE 0.057
- Faded Blue #658CBB ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.064
- Cadet Blue #5F9EA0 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.066
Use #66A2CB 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.