#566CF7
Closest named color: Neon Blue (#4361EE). oklch(59.3% 0.208 271.7), rgb(86, 108, 247).
Aa
Black text reads best on this color (4.88:1).
About this color
#566CF7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.208 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.039 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.208) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #566CF7 |
| RGB | rgb(86, 108, 247) |
| HSL | hsl(232, 91%, 65%) |
| OKLCH | oklch(59.3% 0.208 271.7) |
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 #566CF7 | 4.29:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #566CF7 | 4.88:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #566CF7 text on white | 4.29:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #566CF7 text on black | 4.88:1 | AA | Lc -32.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ABBDFE
oklch(80.8% 0.094 272.2)
-
Step 400
400
#8099FD
oklch(70.8% 0.149 271.5)
-
Step 500
500
#637BFB
oklch(63.1% 0.191 271.8)
-
Step 600
600 (this color)
#566CF7
oklch(59.3% 0.208 271.7)
-
Step 700
700
#3E4ECC
oklch(49.1% 0.194 271.6)
-
Step 800
800
#3341A5
oklch(42.7% 0.161 271.7)
-
Step 900
900
#2C3982
oklch(37.8% 0.123 271.6)
-
Step 950
950
#19224C
oklch(27% 0.078 271.2)
#566CF7 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) | #0081FC | 0.063 |
| Deuteranopia (no green cones) | #0073F4 | 0.053 |
| Tritanopia (no blue cones) | #008EA7 | 0.172 |
| Achromatopsia (no color) | #7A7A7A | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566CF7
#566CF7
oklch(59.3% 0.208 271.7)
- #987B00
#987B00
oklch(59.3% 0.121 92.2)
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 #566CF7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.039
- Royal Blue #4169E1 ΔE 0.042
- Cornflower #6A79F7 ΔE 0.043
- Clear Blue #247AFD ΔE 0.047
- Medium Slate Blue #7B68EE ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.056
- Bright Blue #0165FC ΔE 0.062
- Dark Periwinkle #665FD1 ΔE 0.065
Use #566CF7 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.