#4166B1
Closest named color: French Blue (#436BAD). oklch(52% 0.126 263), rgb(65, 102, 177).
Aa
White text reads best on this color (5.58:1).
About this color
#4166B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.126 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.58:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.76:1 |
| White text | 5.58:1 |
Values
| HEX | #4166B1 |
| RGB | rgb(65, 102, 177) |
| HSL | hsl(220, 46%, 47%) |
| OKLCH | oklch(52% 0.126 263) |
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 #4166B1 | 5.58:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #4166B1 | 3.76:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #4166B1 text on white | 5.58:1 | AA | Lc 77.7 | Fine for body text |
| #4166B1 text on black | 3.76:1 | AA large text | Lc -24.1 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#80A0DE
oklch(70.6% 0.098 263.1)
-
Step 500
500
#6188D5
oklch(63.2% 0.124 262.9)
-
Step 600
600
#4870C2
oklch(55.6% 0.135 263.1)
-
Step 700
700 (this color)
#4166B1
oklch(52% 0.126 263)
-
Step 800
800
#2F4D88
oklch(42.8% 0.104 262.5)
-
Step 900
900
#2A406D
oklch(37.7% 0.082 263.3)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#4166B1 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) | #446DB4 | 0.020 |
| Deuteranopia (no green cones) | #3363AF | 0.018 |
| Tritanopia (no blue cones) | #007783 | 0.106 |
| Achromatopsia (no color) | #686868 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4166B1
#4166B1
oklch(52% 0.126 263)
- #876200
#876200
oklch(52.1% 0.107 82.7)
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 #4166B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Mid Blue #276AB3 ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.047
- Muted Blue #3B719F ΔE 0.047
- Windows Blue #3778BF ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.055
- Denim #3B638C ΔE 0.060
Use #4166B1 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.