#AAC5EF
Closest named color: Light Steel Blue (#B0C4DE). oklch(81.8% 0.066 259.1), rgb(170, 197, 239).
Aa
Black text reads best on this color (11.94:1).
About this color
#AAC5EF is a light, muted blue. In OKLCH its lightness is 82%, its chroma 0.066 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Light Steel Blue (#B0C4DE), ΔE 0.024 away. Black text reads best on it, at 11.94:1.
| Hue family | Blues |
| Lightness | light (82%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Light Steel Blue (#B0C4DE) |
| Black text | 11.94:1 |
| White text | 1.75:1 |
Values
| HEX | #AAC5EF |
| RGB | rgb(170, 197, 239) |
| HSL | hsl(217, 68%, 80%) |
| OKLCH | oklch(81.8% 0.066 259.1) |
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 #AAC5EF | 1.75:1 | Fails | Lc -36.1 | Non-text elements, placeholder text |
| Black text on #AAC5EF | 11.94:1 | AAA | Lc 71.7 | Content text, not long reading |
| #AAC5EF text on white | 1.75:1 | Fails | Lc 32.2 | Non-text elements, placeholder text |
| #AAC5EF text on black | 11.94:1 | AAA | Lc -70.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300 (this color)
#AAC5EF
oklch(81.8% 0.066 259.1)
-
Step 400
400
#78A2E3
oklch(70.8% 0.106 258.9)
-
Step 500
500
#5589DB
oklch(63.2% 0.136 259.2)
-
Step 600
600
#3A71C8
oklch(55.6% 0.147 259.3)
-
Step 700
700
#2C5EAD
oklch(49.1% 0.137 259.3)
-
Step 800
800
#254D8C
oklch(42.6% 0.114 259.2)
-
Step 900
900
#234170
oklch(37.7% 0.088 259.1)
-
Step 950
950
#152642
oklch(27% 0.057 259.9)
#AAC5EF 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) | #B7C7F1 | 0.018 |
| Deuteranopia (no green cones) | #AFC0EE | 0.014 |
| Tritanopia (no blue cones) | #97CED3 | 0.059 |
| Achromatopsia (no color) | #C3C3C3 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AAC5EF
#AAC5EF
oklch(81.8% 0.066 259.1)
- #DBBF93
#DBBF93
oklch(81.8% 0.066 78.8)
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 #AAC5EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Steel Blue #B0C4DE ΔE 0.024
- Baby Blue #A2CFFE ΔE 0.029
- Light Blue Grey #B7C9E2 ΔE 0.029
- Cloudy Blue #ACC2D9 ΔE 0.030
- Pastel Blue #A2BFFE ΔE 0.032
- Light Periwinkle #C1C6FC ΔE 0.036
- Light Cornflower Blue #98C1D9 ΔE 0.040
- Light Sky Blue #87CEFA ΔE 0.042
Use #AAC5EF 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.