#5866EA
Closest named color: Neon Blue (#4361EE). oklch(57.3% 0.197 273.8), rgb(88, 102, 234).
Aa
White text reads best on this color (4.66:1).
About this color
#5866EA is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.197 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.030 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.197) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.50:1 |
| White text | 4.66:1 |
Values
| HEX | #5866EA |
| RGB | rgb(88, 102, 234) |
| HSL | hsl(234, 78%, 63%) |
| OKLCH | oklch(57.3% 0.197 273.8) |
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 #5866EA | 4.66:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #5866EA | 4.50:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #5866EA text on white | 4.66:1 | AA | Lc 72.0 | Content text, not long reading |
| #5866EA text on black | 4.50:1 | AA | Lc -29.7 | Dividers and decoration only |
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
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8598F8
oklch(70.6% 0.142 273.8)
-
Step 500
500
#697BF5
oklch(63% 0.182 273.7)
-
Step 600
600 (this color)
#5866EA
oklch(57.3% 0.197 273.8)
-
Step 700
700
#454FC6
oklch(49.2% 0.183 273.9)
-
Step 800
800
#3841A0
oklch(42.6% 0.152 273.9)
-
Step 900
900
#30397F
oklch(37.8% 0.118 273.9)
-
Step 950
950
#1C224A
oklch(27% 0.074 274)
#5866EA 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) | #007BEE | 0.067 |
| Deuteranopia (no green cones) | #006EE7 | 0.059 |
| Tritanopia (no blue cones) | #00869E | 0.167 |
| Achromatopsia (no color) | #747474 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5866EA
#5866EA
oklch(57.3% 0.197 273.8)
- #8F7600
#8F7600
oklch(57.3% 0.117 94.1)
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 #5866EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.030
- Royal Blue #4169E1 ΔE 0.030
- Dark Periwinkle #665FD1 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.046
- Medium Slate Blue #7B68EE ΔE 0.051
- Light Indigo #6D5ACF ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.055
- Cornflower #6A79F7 ΔE 0.056
Use #5866EA 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.