#405CFB
Closest named color: Neon Blue (#4361EE). oklch(55.7% 0.237 269.2), rgb(64, 92, 251).
Aa
White text reads best on this color (5.07:1).
About this color
#405CFB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.237 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.023 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.237) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #405CFB |
| RGB | rgb(64, 92, 251) |
| HSL | hsl(231, 96%, 62%) |
| OKLCH | oklch(55.7% 0.237 269.2) |
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 #405CFB | 5.07:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #405CFB | 4.14:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #405CFB text on white | 5.07:1 | AA | Lc 74.3 | Content text, not long reading |
| #405CFB text on black | 4.14:1 | AA large text | Lc -27.4 | 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
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#5A7CFF
oklch(63% 0.198 269.1)
-
Step 600
600 (this color)
#405CFB
oklch(55.7% 0.237 269.2)
-
Step 700
700
#334ADB
oklch(49.2% 0.22 269.1)
-
Step 800
800
#2A3EB1
oklch(42.8% 0.183 269.2)
-
Step 900
900
#25378C
oklch(37.8% 0.142 269.2)
-
Step 950
950
#152152
oklch(27% 0.091 269.1)
#405CFB 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) | #0077FF | 0.062 |
| Deuteranopia (no green cones) | #0066F8 | 0.036 |
| Tritanopia (no blue cones) | #0086A3 | 0.187 |
| Achromatopsia (no color) | #6E6E6E | 0.238 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405CFB
#405CFB
oklch(55.7% 0.237 269.2)
- #8E6F00
#8E6F00
oklch(55.6% 0.114 89.2)
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 #405CFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.023
- Bright Blue #0165FC ΔE 0.035
- Azul #1D5DEC ΔE 0.036
- Electric Blue #0652FF ΔE 0.046
- Royal Blue #4169E1 ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.050
- Warm Blue #4B57DB ΔE 0.051
- Clear Blue #247AFD ΔE 0.067
Use #405CFB 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.