#AACEF9
Closest named color: Baby Blue (#A2CFFE). oklch(84% 0.072 253.1), rgb(170, 206, 249).
Aa
Black text reads best on this color (12.90:1).
About this color
#AACEF9 is a light, moderately saturated blue. In OKLCH its lightness is 84%, its chroma 0.072 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Baby Blue (#A2CFFE), ΔE 0.011 away. Black text reads best on it, at 12.90:1.
| Hue family | Blues |
| Lightness | light (84%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Baby Blue (#A2CFFE) |
| Black text | 12.90:1 |
| White text | 1.62:1 |
Values
| HEX | #AACEF9 |
| RGB | rgb(170, 206, 249) |
| HSL | hsl(213, 87%, 82%) |
| OKLCH | oklch(84% 0.072 253.1) |
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 #AACEF9 | 1.62:1 | Fails | Lc -31.6 | Non-text elements, placeholder text |
| Black text on #AACEF9 | 12.90:1 | AAA | Lc 75.8 | Fine for body text |
| #AACEF9 text on white | 1.62:1 | Fails | Lc 28.0 | Dividers and decoration only |
| #AACEF9 text on black | 12.90:1 | AAA | Lc -75.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300 (this color)
#AACEF9
oklch(84% 0.072 253.1)
-
Step 400
400
#6BA4E6
oklch(70.7% 0.114 253)
-
Step 500
500
#408CDF
oklch(63.2% 0.146 252.9)
-
Step 600
600
#1974CD
oklch(55.7% 0.159 253)
-
Step 700
700
#0761B1
oklch(49.2% 0.147 252.8)
-
Step 800
800
#0E4F90
oklch(42.7% 0.124 253.4)
-
Step 900
900
#164273
oklch(37.7% 0.097 253.8)
-
Step 950
950
#0E2743
oklch(26.9% 0.061 253.2)
#AACEF9 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) | #BECFFB | 0.025 |
| Deuteranopia (no green cones) | #B5C7F8 | 0.021 |
| Tritanopia (no blue cones) | #92D7DC | 0.062 |
| Achromatopsia (no color) | #CBCBCB | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AACEF9
#AACEF9
oklch(84% 0.072 253.1)
- #E8C497
#E8C497
oklch(84.1% 0.072 72.8)
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 #AACEF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Baby Blue #A2CFFE ΔE 0.011
- Light Blue Grey #B7C9E2 ΔE 0.033
- Light Periwinkle #C1C6FC ΔE 0.035
- Light Sky Blue #87CEFA ΔE 0.038
- Light Steel Blue #B0C4DE ΔE 0.039
- Light Blue #ADD8E6 ΔE 0.044
- Pastel Blue #A2BFFE ΔE 0.045
- Sky Blue #87CEEB ΔE 0.045
Use #AACEF9 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.