#576ACF
Closest named color: Dark Periwinkle (#665FD1). oklch(56.1% 0.156 272.4), rgb(87, 106, 207).
Aa
White text reads best on this color (4.80:1).
About this color
#576ACF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.156 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.032 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #576ACF |
| RGB | rgb(87, 106, 207) |
| HSL | hsl(231, 56%, 58%) |
| OKLCH | oklch(56.1% 0.156 272.4) |
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 #576ACF | 4.80:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #576ACF | 4.36:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #576ACF text on white | 4.80:1 | AA | Lc 73.1 | Content text, not long reading |
| #576ACF text on black | 4.36:1 | AA large text | Lc -28.6 | Dividers and decoration only |
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 600.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B1BEEF
oklch(80.8% 0.071 273.1)
-
Step 400
400
#899CE7
oklch(70.8% 0.112 272.4)
-
Step 500
500
#6D81E0
oklch(63.1% 0.144 272.7)
-
Step 600
600 (this color)
#576ACF
oklch(56.1% 0.156 272.4)
-
Step 700
700
#4656B2
oklch(49% 0.146 272.5)
-
Step 800
800
#3A4790
oklch(42.7% 0.121 272.7)
-
Step 900
900
#313C73
oklch(37.6% 0.095 272.6)
-
Step 950
950
#1D2443
oklch(27.1% 0.058 272.4)
#576ACF 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) | #3778D3 | 0.044 |
| Deuteranopia (no green cones) | #236DCD | 0.048 |
| Tritanopia (no blue cones) | #008193 | 0.138 |
| Achromatopsia (no color) | #727272 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576ACF
#576ACF
oklch(56.1% 0.156 272.4)
- #8D7200
#8D7200
oklch(56.2% 0.115 92.3)
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 #576ACF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.032
- Royal Blue #4169E1 ΔE 0.037
- Slate Blue #6A5ACD ΔE 0.044
- Iris #6258C4 ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.046
- Warm Blue #4B57DB ΔE 0.055
- Windows Blue #3778BF ΔE 0.056
- Neon Blue #4361EE ΔE 0.059
Use #576ACF 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.