#5C66FF
Closest named color: Neon Blue (#4361EE). oklch(59.2% 0.224 274.4), rgb(92, 102, 255).
Aa
Black text reads best on this color (4.79:1).
About this color
#5C66FF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.224 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.042 away. Black text reads best on it, at 4.79:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.224) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.79:1 |
| White text | 4.37:1 |
Values
| HEX | #5C66FF |
| RGB | rgb(92, 102, 255) |
| HSL | hsl(236, 100%, 68%) |
| OKLCH | oklch(59.2% 0.224 274.4) |
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 #5C66FF | 4.37:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #5C66FF | 4.79:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #5C66FF text on white | 4.37:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #5C66FF text on black | 4.79:1 | AA | Lc -31.9 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8597FF
oklch(70.8% 0.153 274.4)
-
Step 500
500
#6978FF
oklch(63.1% 0.199 274.4)
-
Step 600
600 (this color)
#5C66FF
oklch(59.2% 0.224 274.4)
-
Step 700
700
#4448D3
oklch(49% 0.208 274.3)
-
Step 800
800
#383DAB
oklch(42.8% 0.172 274.4)
-
Step 900
900
#2F3687
oklch(37.8% 0.134 274.3)
-
Step 950
950
#1B204F
oklch(26.9% 0.086 274.6)
#5C66FF 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) | #0080FF | 0.074 |
| Deuteranopia (no green cones) | #0072FC | 0.062 |
| Tritanopia (no blue cones) | #008CA9 | 0.185 |
| Achromatopsia (no color) | #797979 | 0.224 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5C66FF
#5C66FF
oklch(59.2% 0.224 274.4)
- #957C00
#957C00
oklch(59.2% 0.122 94.8)
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 #5C66FF, closest first.
No curated palette has a color within ΔE 0.04 of #5C66FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.042
- Medium Slate Blue #7B68EE ΔE 0.052
- Cornflower #6A79F7 ΔE 0.052
- Royal Blue #4169E1 ΔE 0.056
- Clear Blue #247AFD ΔE 0.060
- Bright Blue #0165FC ΔE 0.065
- Cerulean Blue #056EEE ΔE 0.067
- Warm Blue #4B57DB ΔE 0.069
Use #5C66FF 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.