#AAC9FF
Closest named color: Baby Blue (#A2CFFE). oklch(83.2% 0.083 261.4), rgb(170, 201, 255).
Aa
Black text reads best on this color (12.50:1).
About this color
#AAC9FF is a light, moderately saturated blue. In OKLCH its lightness is 83%, its chroma 0.083 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Baby Blue (#A2CFFE), ΔE 0.018 away. Black text reads best on it, at 12.50:1.
| Hue family | Blues |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Baby Blue (#A2CFFE) |
| Black text | 12.50:1 |
| White text | 1.67:1 |
Values
| HEX | #AAC9FF |
| RGB | rgb(170, 201, 255) |
| HSL | hsl(218, 100%, 83%) |
| OKLCH | oklch(83.2% 0.083 261.4) |
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 #AAC9FF | 1.67:1 | Fails | Lc -33.4 | Non-text elements, placeholder text |
| Black text on #AAC9FF | 12.50:1 | AAA | Lc 74.1 | Content text, not long reading |
| #AAC9FF text on white | 1.67:1 | Fails | Lc 29.7 | Dividers and decoration only |
| #AAC9FF text on black | 12.50:1 | AAA | Lc -73.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300 (this color)
#AAC9FF
oklch(83.2% 0.083 261.4)
-
Step 400
400
#71A0F3
oklch(70.8% 0.132 261.2)
-
Step 500
500
#4B85EF
oklch(63.1% 0.171 261.3)
-
Step 600
600
#2F6CDE
oklch(55.7% 0.186 261.5)
-
Step 700
700
#2259C0
oklch(49% 0.172 261.5)
-
Step 800
800
#1D4A9C
oklch(42.8% 0.143 261.2)
-
Step 900
900
#1D3E7C
oklch(37.6% 0.112 261.6)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#AAC9FF 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) | #B7CCFF | 0.019 |
| Deuteranopia (no green cones) | #AEC4FE | 0.013 |
| Tritanopia (no blue cones) | #91D4DB | 0.074 |
| Achromatopsia (no color) | #C8C8C8 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AAC9FF
#AAC9FF
oklch(83.2% 0.083 261.4)
- #E4C389
#E4C389
oklch(83.2% 0.084 81.2)
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 #AAC9FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Baby Blue #A2CFFE ΔE 0.018
- Light Periwinkle #C1C6FC ΔE 0.029
- Pastel Blue #A2BFFE ΔE 0.029
- Light Sky Blue #87CEFA ΔE 0.041
- Light Blue Grey #B7C9E2 ΔE 0.043
- Sky #82CAFC ΔE 0.044
- Light Steel Blue #B0C4DE ΔE 0.045
- Cloudy Blue #ACC2D9 ΔE 0.052
Use #AAC9FF 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.