#AEC3D9
Closest named color: Cloudy Blue (#ACC2D9). oklch(80.8% 0.039 249.5), rgb(174, 195, 217).
Aa
Black text reads best on this color (11.60:1).
About this color
#AEC3D9 is a light, muted blue. In OKLCH its lightness is 81%, its chroma 0.039 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cloudy Blue (#ACC2D9), ΔE 0.004 away. Black text reads best on it, at 11.60:1.
| Hue family | Blues |
| Lightness | light (81%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Cloudy Blue (#ACC2D9) |
| Black text | 11.60:1 |
| White text | 1.80:1 |
Values
| HEX | #AEC3D9 |
| RGB | rgb(174, 195, 217) |
| HSL | hsl(211, 36%, 77%) |
| OKLCH | oklch(80.8% 0.039 249.5) |
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 #AEC3D9 | 1.80:1 | Fails | Lc -37.7 | Non-text elements, placeholder text |
| Black text on #AEC3D9 | 11.60:1 | AAA | Lc 70.2 | Content text, not long reading |
| #AEC3D9 text on white | 1.80:1 | Fails | Lc 33.7 | Non-text elements, placeholder text |
| #AEC3D9 text on black | 11.60:1 | AAA | Lc -68.9 | Content text, not long reading |
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 300.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300 (this color)
#AEC3D9
oklch(80.8% 0.039 249.5)
-
Step 400
400
#83A4C6
oklch(70.6% 0.062 249.5)
-
Step 500
500
#648DB8
oklch(63% 0.079 250.3)
-
Step 600
600
#4A77A4
oklch(55.6% 0.086 249.6)
-
Step 700
700
#3B648C
oklch(49.1% 0.079 249.2)
-
Step 800
800
#315272
oklch(42.8% 0.066 248.9)
-
Step 900
900
#2C445C
oklch(37.8% 0.051 249.3)
-
Step 950
950
#1A2836
oklch(27.1% 0.032 249.1)
#AEC3D9 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) | #BBC3DA | 0.017 |
| Deuteranopia (no green cones) | #B6BFD9 | 0.014 |
| Tritanopia (no blue cones) | #A3C8CA | 0.033 |
| Achromatopsia (no color) | #C1C1C1 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AEC3D9
#AEC3D9
oklch(80.8% 0.039 249.5)
- #D1BDA6
#D1BDA6
oklch(80.9% 0.039 71.1)
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 #AEC3D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cloudy Blue #ACC2D9 ΔE 0.004
- Light Steel Blue #B0C4DE ΔE 0.008
- Light Blue Grey #B7C9E2 ΔE 0.022
- Light Cornflower Blue #98C1D9 ΔE 0.028
- Light Grey Blue #9DBCD4 ΔE 0.030
- Silver #C0C0C0 ΔE 0.039
- French Gray #ADB5BD ΔE 0.046
- Sky Blue #87CEEB ΔE 0.049
Use #AEC3D9 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.