#566AE7
Closest named color: Royal Blue (#4169E1). oklch(57.7% 0.189 272.2), rgb(86, 106, 231).
Aa
Black text reads best on this color (4.61:1).
About this color
#566AE7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.189 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.026 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.61:1 |
| White text | 4.55:1 |
Values
| HEX | #566AE7 |
| RGB | rgb(86, 106, 231) |
| HSL | hsl(232, 75%, 62%) |
| OKLCH | oklch(57.7% 0.189 272.2) |
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 #566AE7 | 4.55:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #566AE7 | 4.61:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #566AE7 text on white | 4.55:1 | AA | Lc 71.3 | Content text, not long reading |
| #566AE7 text on black | 4.61:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#ADBEF8
oklch(80.9% 0.084 271.8)
-
Step 400
400
#849AF5
oklch(70.8% 0.136 272.2)
-
Step 500
500
#677DF1
oklch(63% 0.174 272.4)
-
Step 600
600 (this color)
#566AE7
oklch(57.7% 0.189 272.2)
-
Step 700
700
#4251C2
oklch(49% 0.176 272.4)
-
Step 800
800
#36439D
oklch(42.6% 0.146 272.4)
-
Step 900
900
#2E3A7D
oklch(37.7% 0.114 272.2)
-
Step 950
950
#1B2349
oklch(27.1% 0.071 272)
#566AE7 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) | #077CEB | 0.060 |
| Deuteranopia (no green cones) | #0070E4 | 0.055 |
| Tritanopia (no blue cones) | #00889E | 0.160 |
| Achromatopsia (no color) | #767676 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566AE7
#566AE7
oklch(57.7% 0.189 272.2)
- #927600
#927600
oklch(57.6% 0.118 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 #566AE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.026
- Neon Blue #4361EE ΔE 0.035
- Dark Periwinkle #665FD1 ΔE 0.044
- Warm Blue #4B57DB ΔE 0.052
- Cornflower #6A79F7 ΔE 0.052
- Medium Slate Blue #7B68EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.056
Use #566AE7 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.