#576FDC
Closest named color: Royal Blue (#4169E1). oklch(57.9% 0.168 271), rgb(87, 111, 220).
Aa
Black text reads best on this color (4.71:1).
About this color
#576FDC is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.168 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.032 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #576FDC |
| RGB | rgb(87, 111, 220) |
| HSL | hsl(229, 66%, 60%) |
| OKLCH | oklch(57.9% 0.168 271) |
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 #576FDC | 4.45:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #576FDC | 4.71:1 | AA | Lc 33.4 | Non-text elements, placeholder text |
| #576FDC text on white | 4.45:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #576FDC text on black | 4.71:1 | AA | Lc -31.0 | 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
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#859CEC
oklch(70.8% 0.12 270.9)
-
Step 500
500
#6881E6
oklch(63.2% 0.154 271)
-
Step 600
600 (this color)
#576FDC
oklch(57.9% 0.168 271)
-
Step 700
700
#4256B8
oklch(49.2% 0.156 270.9)
-
Step 800
800
#364795
oklch(42.8% 0.129 270.8)
-
Step 900
900
#2E3C76
oklch(37.6% 0.1 270.7)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#576FDC 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) | #357EE0 | 0.045 |
| Deuteranopia (no green cones) | #1772DA | 0.050 |
| Tritanopia (no blue cones) | #00889B | 0.145 |
| Achromatopsia (no color) | #777777 | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576FDC
#576FDC
oklch(57.9% 0.168 271)
- #947600
#947600
oklch(57.8% 0.118 90.9)
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 #576FDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.032
- Dark Periwinkle #665FD1 ΔE 0.043
- Neon Blue #4361EE ΔE 0.052
- Cornflower #6A79F7 ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.056
- Light Indigo #6D5ACF ΔE 0.057
- Medium Slate Blue #7B68EE ΔE 0.058
- Cerulean Blue #056EEE ΔE 0.061
Use #576FDC 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.