#406ECE
Closest named color: Royal Blue (#4169E1). oklch(55.6% 0.157 263), rgb(64, 110, 206).
Aa
White text reads best on this color (4.83:1).
About this color
#406ECE is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.157 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.033 away. White text reads best on it, at 4.83:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.33:1 |
| White text | 4.83:1 |
Values
| HEX | #406ECE |
| RGB | rgb(64, 110, 206) |
| HSL | hsl(221, 59%, 53%) |
| OKLCH | oklch(55.6% 0.157 263) |
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 #406ECE | 4.83:1 | AA | Lc -78.7 | Fine for body text |
| Black text on #406ECE | 4.33:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #406ECE text on white | 4.83:1 | AA | Lc 73.2 | Content text, not long reading |
| #406ECE text on black | 4.33:1 | AA large text | Lc -28.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1EF
oklch(80.9% 0.07 263.3)
-
Step 400
400
#7BA0E7
oklch(70.7% 0.112 262.8)
-
Step 500
500
#5A86E0
oklch(63.1% 0.144 263.2)
-
Step 600
600 (this color)
#406ECE
oklch(55.6% 0.157 263)
-
Step 700
700
#325BB2
oklch(49% 0.146 263.1)
-
Step 800
800
#2A4B90
oklch(42.7% 0.121 263.1)
-
Step 900
900
#263F73
oklch(37.6% 0.094 263.2)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#406ECE 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) | #3C79D2 | 0.029 |
| Deuteranopia (no green cones) | #1D6BCC | 0.028 |
| Tritanopia (no blue cones) | #008494 | 0.126 |
| Achromatopsia (no color) | #727272 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406ECE
#406ECE
oklch(55.6% 0.157 263)
- #936C00
#936C00
oklch(55.6% 0.114 83.5)
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 #406ECE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.033
- Windows Blue #3778BF ΔE 0.039
- Mid Blue #276AB3 ΔE 0.049
- French Blue #436BAD ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.056
- Cerulean Blue #056EEE ΔE 0.056
- Neon Blue #4361EE ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
Use #406ECE 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.