#405EE5
Closest named color: Neon Blue (#4361EE). oklch(54.2% 0.207 268.8), rgb(64, 94, 229).
Aa
White text reads best on this color (5.31:1).
About this color
#405EE5 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.207 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.016 away. White text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #405EE5 |
| RGB | rgb(64, 94, 229) |
| HSL | hsl(229, 76%, 57%) |
| OKLCH | oklch(54.2% 0.207 268.8) |
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 #405EE5 | 5.31:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #405EE5 | 3.95:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #405EE5 text on white | 5.31:1 | AA | Lc 75.9 | Fine for body text |
| #405EE5 text on black | 3.95:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A8BFFE
oklch(81% 0.093 268.8)
-
Step 400
400
#7A9AFD
oklch(70.6% 0.149 268.8)
-
Step 500
500
#5B7EFB
oklch(63.2% 0.19 268.7)
-
Step 600
600 (this color)
#405EE5
oklch(54.2% 0.207 268.8)
-
Step 700
700
#3651CC
oklch(49.2% 0.192 268.7)
-
Step 800
800
#2D43A5
oklch(42.8% 0.16 268.9)
-
Step 900
900
#273A82
oklch(37.7% 0.123 268.7)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#405EE5 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) | #0073E9 | 0.054 |
| Deuteranopia (no green cones) | #0064E2 | 0.036 |
| Tritanopia (no blue cones) | #008098 | 0.165 |
| Achromatopsia (no color) | #6B6B6B | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405EE5
#405EE5
oklch(54.2% 0.207 268.8)
- #896B00
#896B00
oklch(54.2% 0.111 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 #405EE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.016
- Warm Blue #4B57DB ΔE 0.023
- Royal Blue #4169E1 ΔE 0.027
- Azul #1D5DEC ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.045
- Bright Blue #0165FC ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.058
- Electric Blue #0652FF ΔE 0.061
Use #405EE5 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.