#576FCF
Closest named color: Royal Blue (#4169E1). oklch(57.1% 0.15 270.5), rgb(87, 111, 207).
Aa
White text reads best on this color (4.58:1).
About this color
#576FCF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.150 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.042 away. White text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.58:1 |
| White text | 4.58:1 |
Values
| HEX | #576FCF |
| RGB | rgb(87, 111, 207) |
| HSL | hsl(228, 56%, 58%) |
| OKLCH | oklch(57.1% 0.15 270.5) |
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 #576FCF | 4.58:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #576FCF | 4.58:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #576FCF text on white | 4.58:1 | AA | Lc 71.6 | Content text, not long reading |
| #576FCF text on black | 4.58:1 | AA | Lc -30.1 | Non-text elements, placeholder text |
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
#E5EAF7
oklch(93.7% 0.018 269.1)
-
Step 200
200
#CFD8F3
oklch(88.4% 0.038 271)
-
Step 300
300
#B0BFED
oklch(80.9% 0.067 270.7)
-
Step 400
400
#879DE4
oklch(70.7% 0.107 270.3)
-
Step 500
500
#6A83DC
oklch(63.1% 0.137 270.3)
-
Step 600
600 (this color)
#576FCF
oklch(57.1% 0.15 270.5)
-
Step 700
700
#4458AF
oklch(49.1% 0.14 270.7)
-
Step 800
800
#38498D
oklch(42.8% 0.114 270.4)
-
Step 900
900
#303D71
oklch(37.6% 0.09 271)
-
Step 950
950
#1C2442
oklch(26.9% 0.057 270.9)
#576FCF 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) | #427BD3 | 0.035 |
| Deuteranopia (no green cones) | #3070CD | 0.038 |
| Tritanopia (no blue cones) | #008495 | 0.132 |
| Achromatopsia (no color) | #757575 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576FCF
#576FCF
oklch(57.1% 0.15 270.5)
- #927400
#927400
oklch(57.2% 0.117 90.6)
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 #576FCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.042
- Dark Periwinkle #665FD1 ΔE 0.043
- Windows Blue #3778BF ΔE 0.048
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.056
- Iris #6258C4 ΔE 0.058
- French Blue #436BAD ΔE 0.060
- Neon Blue #4361EE ΔE 0.066
Use #576FCF 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.