#A3AACC
Closest named color: Cool Steel (#97A7B3). oklch(74.4% 0.05 276), rgb(163, 170, 204).
Aa
Black text reads best on this color (9.17:1).
About this color
#A3AACC is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.050 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.041 away. Black text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.17:1 |
| White text | 2.28:1 |
Values
| HEX | #A3AACC |
| RGB | rgb(163, 170, 204) |
| HSL | hsl(230, 29%, 72%) |
| OKLCH | oklch(74.4% 0.05 276) |
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 #A3AACC | 2.28:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #A3AACC | 9.17:1 | AAA | Lc 58.9 | Large or bold text, headings |
| #A3AACC text on white | 2.28:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #A3AACC text on black | 9.17:1 | AAA | Lc -57.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D6D8E5
oklch(88.5% 0.018 279)
-
Step 300
300
#BBBFD5
oklch(80.8% 0.031 277.5)
-
Step 400
400 (this color)
#A3AACC
oklch(74.4% 0.05 276)
-
Step 500
500
#7F87B0
oklch(63.2% 0.062 275.9)
-
Step 600
600
#68709C
oklch(55.6% 0.069 276)
-
Step 700
700
#575E85
oklch(49.2% 0.063 276)
-
Step 800
800
#474D6C
oklch(42.8% 0.052 275.5)
-
Step 900
900
#3B4058
oklch(37.7% 0.042 275.1)
-
Step 950
950
#232533
oklch(26.9% 0.026 278.2)
#A3AACC 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) | #A1ADCE | 0.008 |
| Deuteranopia (no green cones) | #9EAACB | 0.007 |
| Tritanopia (no blue cones) | #9AB0B5 | 0.044 |
| Achromatopsia (no color) | #ABABAB | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3AACC
#A3AACC
oklch(74.4% 0.05 276)
- #B5AC89
#B5AC89
oklch(74.3% 0.049 95.3)
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 #A3AACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.041
- French Gray #ADB5BD ΔE 0.045
- Light Grey Blue #9DBCD4 ΔE 0.046
- Dark Gray #A9A9A9 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.059
- Bluey Grey #89A0B0 ΔE 0.059
- Cool Grey #95A3A6 ΔE 0.059
- Light Cornflower Blue #98C1D9 ΔE 0.059
Use #A3AACC 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.