#405EF0
Closest named color: Neon Blue (#4361EE). oklch(55.1% 0.221 268.9), rgb(64, 94, 240).
Aa
White text reads best on this color (5.15:1).
About this color
#405EF0 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.221 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.009 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.221) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #405EF0 |
| RGB | rgb(64, 94, 240) |
| HSL | hsl(230, 85%, 60%) |
| OKLCH | oklch(55.1% 0.221 268.9) |
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 #405EF0 | 5.15:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #405EF0 | 4.07:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #405EF0 text on white | 5.15:1 | AA | Lc 74.8 | Content text, not long reading |
| #405EF0 text on black | 4.07:1 | AA large text | Lc -26.9 | 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
#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)
#405EF0
oklch(55.1% 0.221 268.9)
-
Step 700
700
#344ED3
oklch(49.2% 0.206 268.8)
-
Step 800
800
#2B41AA
oklch(42.7% 0.17 268.8)
-
Step 900
900
#263987
oklch(37.8% 0.132 268.8)
-
Step 950
950
#16224F
oklch(27% 0.084 268.9)
#405EF0 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) | #0076F5 | 0.058 |
| Deuteranopia (no green cones) | #0065ED | 0.035 |
| Tritanopia (no blue cones) | #00839E | 0.174 |
| Achromatopsia (no color) | #6D6D6D | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405EF0
#405EF0
oklch(55.1% 0.221 268.9)
- #8C6D00
#8C6D00
oklch(55% 0.112 88.9)
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 #405EF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.009
- Azul #1D5DEC ΔE 0.029
- Royal Blue #4169E1 ΔE 0.035
- Warm Blue #4B57DB ΔE 0.036
- Bright Blue #0165FC ΔE 0.037
- Cerulean Blue #056EEE ΔE 0.043
- Electric Blue #0652FF ΔE 0.053
- Clear Blue #247AFD ΔE 0.066
Use #405EF0 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.