#406BCF
Closest named color: Royal Blue (#4169E1). oklch(55% 0.162 264.3), rgb(64, 107, 207).
Aa
White text reads best on this color (4.97:1).
About this color
#406BCF is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.162 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.029 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #406BCF |
| RGB | rgb(64, 107, 207) |
| HSL | hsl(222, 60%, 53%) |
| OKLCH | oklch(55% 0.162 264.3) |
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 #406BCF | 4.97:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #406BCF | 4.22:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #406BCF text on white | 4.97:1 | AA | Lc 74.1 | Content text, not long reading |
| #406BCF text on black | 4.22:1 | AA large text | Lc -27.6 | 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
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#A9C1F1
oklch(81% 0.073 264)
-
Step 400
400
#7C9FEA
oklch(70.7% 0.117 264.5)
-
Step 500
500
#5B85E3
oklch(63.1% 0.149 264.4)
-
Step 600
600 (this color)
#406BCF
oklch(55% 0.162 264.3)
-
Step 700
700
#345AB5
oklch(49.1% 0.151 264.5)
-
Step 800
800
#2B4A92
oklch(42.6% 0.124 264.3)
-
Step 900
900
#273F75
oklch(37.8% 0.097 264.3)
-
Step 950
950
#172544
oklch(27% 0.061 264.4)
#406BCF 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) | #3477D3 | 0.031 |
| Deuteranopia (no green cones) | #0A6ACD | 0.033 |
| Tritanopia (no blue cones) | #008293 | 0.130 |
| Achromatopsia (no color) | #707070 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406BCF
#406BCF
oklch(55% 0.162 264.3)
- #906B00
#906B00
oklch(55% 0.113 84.6)
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 #406BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.029
- Windows Blue #3778BF ΔE 0.046
- Mid Blue #276AB3 ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.052
- Warm Blue #4B57DB ΔE 0.053
- French Blue #436BAD ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.054
- Neon Blue #4361EE ΔE 0.055
Use #406BCF 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.