#406CD3
Closest named color: Royal Blue (#4169E1). oklch(55.5% 0.166 264.3), rgb(64, 108, 211).
Aa
White text reads best on this color (4.87:1).
About this color
#406CD3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.166 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.023 away. White text reads best on it, at 4.87:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.30:1 |
| White text | 4.87:1 |
Values
| HEX | #406CD3 |
| RGB | rgb(64, 108, 211) |
| HSL | hsl(222, 63%, 54%) |
| OKLCH | oklch(55.5% 0.166 264.3) |
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 #406CD3 | 4.87:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #406CD3 | 4.30:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #406CD3 text on white | 4.87:1 | AA | Lc 73.5 | Content text, not long reading |
| #406CD3 text on black | 4.30:1 | AA large text | Lc -28.2 | 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
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F5
oklch(88.4% 0.042 264.3)
-
Step 300
300
#A8C1F2
oklch(80.9% 0.075 263.7)
-
Step 400
400
#7B9FEB
oklch(70.7% 0.119 264.3)
-
Step 500
500
#5A85E5
oklch(63.1% 0.152 264.3)
-
Step 600
600 (this color)
#406CD3
oklch(55.5% 0.166 264.3)
-
Step 700
700
#325AB7
oklch(49.1% 0.154 264)
-
Step 800
800
#2A4A94
oklch(42.7% 0.128 264.1)
-
Step 900
900
#263E76
oklch(37.6% 0.1 264.6)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#406CD3 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) | #3278D7 | 0.031 |
| Deuteranopia (no green cones) | #006BD1 | 0.035 |
| Tritanopia (no blue cones) | #008495 | 0.134 |
| Achromatopsia (no color) | #717171 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406CD3
#406CD3
oklch(55.5% 0.166 264.3)
- #926C00
#926C00
oklch(55.5% 0.114 84.1)
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 #406CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.023
- Windows Blue #3778BF ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.049
- Neon Blue #4361EE ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.053
- Mid Blue #276AB3 ΔE 0.056
- French Blue #436BAD ΔE 0.059
Use #406CD3 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.