#576FD4
Closest named color: Royal Blue (#4169E1). oklch(57.4% 0.157 270.7), rgb(87, 111, 212).
Aa
Black text reads best on this color (4.62:1).
About this color
#576FD4 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.157 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.037 away. Black text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.62:1 |
| White text | 4.53:1 |
Values
| HEX | #576FD4 |
| RGB | rgb(87, 111, 212) |
| HSL | hsl(228, 59%, 59%) |
| OKLCH | oklch(57.4% 0.157 270.7) |
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 #576FD4 | 4.53:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #576FD4 | 4.62:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #576FD4 text on white | 4.53:1 | AA | Lc 71.2 | Content text, not long reading |
| #576FD4 text on black | 4.62:1 | AA | Lc -30.4 | 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
#E4E9F8
oklch(93.5% 0.021 271.2)
-
Step 200
200
#CFD8F4
oklch(88.4% 0.04 271.4)
-
Step 300
300
#AFBFEF
oklch(80.9% 0.07 270.4)
-
Step 400
400
#869CE7
oklch(70.6% 0.113 270.8)
-
Step 500
500
#6982E0
oklch(63.1% 0.144 270.6)
-
Step 600
600 (this color)
#576FD4
oklch(57.4% 0.157 270.7)
-
Step 700
700
#4357B2
oklch(49% 0.146 270.8)
-
Step 800
800
#374890
oklch(42.7% 0.12 270.6)
-
Step 900
900
#2F3D73
oklch(37.7% 0.094 270.4)
-
Step 950
950
#1C2443
oklch(27% 0.059 271.1)
#576FD4 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) | #3D7CD8 | 0.039 |
| Deuteranopia (no green cones) | #2971D2 | 0.042 |
| Tritanopia (no blue cones) | #008697 | 0.138 |
| Achromatopsia (no color) | #767676 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576FD4
#576FD4
oklch(57.4% 0.157 270.7)
- #937500
#937500
oklch(57.5% 0.118 90.8)
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 #576FD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.041
- Windows Blue #3778BF ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.055
- Iris #6258C4 ΔE 0.059
- Neon Blue #4361EE ΔE 0.060
- Cornflower #6A79F7 ΔE 0.063
Use #576FD4 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.