#A3CEE9
Closest named color: Light Blue Grey (#B7C9E2). oklch(83% 0.059 236), rgb(163, 206, 233).
Aa
Black text reads best on this color (12.56:1).
About this color
#A3CEE9 is a light, muted blue. In OKLCH its lightness is 83%, its chroma 0.059 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Light Blue Grey (#B7C9E2), ΔE 0.026 away. Black text reads best on it, at 12.56:1.
| Hue family | Blues |
| Lightness | light (83%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Light Blue Grey (#B7C9E2) |
| Black text | 12.56:1 |
| White text | 1.67:1 |
Values
| HEX | #A3CEE9 |
| RGB | rgb(163, 206, 233) |
| HSL | hsl(203, 61%, 78%) |
| OKLCH | oklch(83% 0.059 236) |
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 #A3CEE9 | 1.67:1 | Fails | Lc -33.2 | Non-text elements, placeholder text |
| Black text on #A3CEE9 | 12.56:1 | AAA | Lc 74.4 | Content text, not long reading |
| #A3CEE9 text on white | 1.67:1 | Fails | Lc 29.4 | Dividers and decoration only |
| #A3CEE9 text on black | 12.56:1 | AAA | Lc -73.4 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C5DDEC
oklch(88.4% 0.033 235.2)
-
Step 300
300 (this color)
#A3CEE9
oklch(83% 0.059 236)
-
Step 400
400
#62AAD4
oklch(70.7% 0.095 235.9)
-
Step 500
500
#2B94C8
oklch(63.2% 0.12 235.5)
-
Step 600
600
#007CAF
oklch(55.5% 0.12 236.1)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#044765
oklch(37.6% 0.078 235.6)
-
Step 950
950
#082A3B
oklch(27% 0.049 234.9)
#A3CEE9 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) | #C2CDEA | 0.038 |
| Deuteranopia (no green cones) | #B8C5E9 | 0.033 |
| Tritanopia (no blue cones) | #8DD5D7 | 0.044 |
| Achromatopsia (no color) | #C8C8C8 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3CEE9
#A3CEE9
oklch(83% 0.059 236)
- #E6BEA3
#E6BEA3
oklch(83% 0.059 55.8)
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 #A3CEE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Blue Grey #B7C9E2 ΔE 0.026
- Light Steel Blue #B0C4DE ΔE 0.028
- Baby Blue #A2CFFE ΔE 0.030
- Sky Blue #87CEEB ΔE 0.030
- Light Blue #ADD8E6 ΔE 0.032
- Cloudy Blue #ACC2D9 ΔE 0.033
- Light Sky Blue #87CEFA ΔE 0.037
- Light Cornflower Blue #98C1D9 ΔE 0.041
Use #A3CEE9 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.