#406CB1
Closest named color: French Blue (#436BAD). oklch(53.3% 0.119 259.1), rgb(64, 108, 177).
Aa
White text reads best on this color (5.25:1).
About this color
#406CB1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.119 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.007 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #406CB1 |
| RGB | rgb(64, 108, 177) |
| HSL | hsl(217, 47%, 47%) |
| OKLCH | oklch(53.3% 0.119 259.1) |
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 #406CB1 | 5.25:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #406CB1 | 3.99:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #406CB1 text on white | 5.25:1 | AA | Lc 75.9 | Fine for body text |
| #406CB1 text on black | 3.99:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#80A2D6
oklch(70.7% 0.085 258.7)
-
Step 500
500
#608ACC
oklch(63.1% 0.11 259.1)
-
Step 600
600 (this color)
#406CB1
oklch(53.3% 0.119 259.1)
-
Step 700
700
#38609F
oklch(49.1% 0.111 259.1)
-
Step 800
800
#2F4F81
oklch(42.8% 0.092 259)
-
Step 900
900
#2A4267
oklch(37.8% 0.07 258.8)
-
Step 950
950
#19273D
oklch(27.2% 0.046 259.2)
#406CB1 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) | #4E72B4 | 0.024 |
| Deuteranopia (no green cones) | #3E67B0 | 0.014 |
| Tritanopia (no blue cones) | #007C86 | 0.099 |
| Achromatopsia (no color) | #6C6C6C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #406CB1
#406CB1
oklch(53.3% 0.119 259.1)
- #8F6400
#8F6400
oklch(53.4% 0.111 79.2)
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 #406CB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.007
- Mid Blue #276AB3 ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.027
- Muted Blue #3B719F ΔE 0.035
- Windows Blue #3778BF ΔE 0.036
- Nice Blue #107AB0 ΔE 0.046
- Dull Blue #49759C ΔE 0.048
- Dusky Blue #475F94 ΔE 0.052
Use #406CB1 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.