#5C66F2
Closest named color: Neon Blue (#4361EE). oklch(58.2% 0.207 274.9), rgb(92, 102, 242).
Aa
Black text reads best on this color (4.63:1).
About this color
#5C66F2 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.207 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.034 away. Black text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #5C66F2 |
| RGB | rgb(92, 102, 242) |
| HSL | hsl(236, 85%, 65%) |
| OKLCH | oklch(58.2% 0.207 274.9) |
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 #5C66F2 | 4.52:1 | AA | Lc -76.5 | Fine for body text |
| Black text on #5C66F2 | 4.63:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #5C66F2 text on white | 4.52:1 | AA | Lc 71.0 | Content text, not long reading |
| #5C66F2 text on black | 4.63:1 | AA | Lc -30.7 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FC
oklch(88.5% 0.052 275.7)
-
Step 300
300
#AFBCFD
oklch(80.9% 0.093 275.4)
-
Step 400
400
#8697FC
oklch(70.7% 0.148 274.7)
-
Step 500
500
#6B79FA
oklch(63.1% 0.19 274.9)
-
Step 600
600 (this color)
#5C66F2
oklch(58.2% 0.207 274.9)
-
Step 700
700
#464CCB
oklch(49.1% 0.193 274.7)
-
Step 800
800
#393FA4
oklch(42.6% 0.16 274.7)
-
Step 900
900
#303782
oklch(37.6% 0.125 274.7)
-
Step 950
950
#1C214C
oklch(27% 0.079 274.8)
#5C66F2 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) | #007DF7 | 0.071 |
| Deuteranopia (no green cones) | #0070EF | 0.063 |
| Tritanopia (no blue cones) | #0088A2 | 0.174 |
| Achromatopsia (no color) | #767676 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5C66F2
#5C66F2
oklch(58.2% 0.207 274.9)
- #917900
#917900
oklch(58.2% 0.119 95.1)
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 #5C66F2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.034
- Royal Blue #4169E1 ΔE 0.041
- Medium Slate Blue #7B68EE ΔE 0.046
- Cornflower #6A79F7 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.056
- Clear Blue #247AFD ΔE 0.061
- Light Indigo #6D5ACF ΔE 0.062
Use #5C66F2 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.