#405BEE
Closest named color: Neon Blue (#4361EE). oklch(54.4% 0.222 269.4), rgb(64, 91, 238).
Aa
White text reads best on this color (5.31:1).
About this color
#405BEE is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.222 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.014 away. White text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.222) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 3.94:1 |
| White text | 5.31:1 |
Values
| HEX | #405BEE |
| RGB | rgb(64, 91, 238) |
| HSL | hsl(231, 84%, 59%) |
| OKLCH | oklch(54.4% 0.222 269.4) |
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 #405BEE | 5.31:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #405BEE | 3.94:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #405BEE text on white | 5.31:1 | AA | Lc 75.8 | Fine for body text |
| #405BEE text on black | 3.94:1 | AA large text | Lc -25.9 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5B7CFF
oklch(63.1% 0.198 269.4)
-
Step 600
600 (this color)
#405BEE
oklch(54.4% 0.222 269.4)
-
Step 700
700
#364DD3
oklch(49.1% 0.206 269.4)
-
Step 800
800
#2C40AB
oklch(42.7% 0.172 269.4)
-
Step 900
900
#273887
oklch(37.7% 0.133 269.7)
-
Step 950
950
#16224F
oklch(27% 0.084 268.9)
#405BEE 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) | #0073F3 | 0.058 |
| Deuteranopia (no green cones) | #0063EB | 0.036 |
| Tritanopia (no blue cones) | #00819C | 0.175 |
| Achromatopsia (no color) | #6B6B6B | 0.222 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405BEE
#405BEE
oklch(54.4% 0.222 269.4)
- #896C00
#896C00
oklch(54.4% 0.111 90.1)
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 #405BEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.014
- Azul #1D5DEC ΔE 0.027
- Warm Blue #4B57DB ΔE 0.032
- Royal Blue #4169E1 ΔE 0.039
- Bright Blue #0165FC ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.048
- Electric Blue #0652FF ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.068
Use #405BEE 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.