#4166A3
Closest named color: French Blue (#436BAD). oklch(51.2% 0.106 259.9), rgb(65, 102, 163).
Aa
White text reads best on this color (5.74:1).
About this color
#4166A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.106 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.020 away. White text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #4166A3 |
| RGB | rgb(65, 102, 163) |
| HSL | hsl(217, 43%, 45%) |
| OKLCH | oklch(51.2% 0.106 259.9) |
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 #4166A3 | 5.74:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #4166A3 | 3.65:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #4166A3 text on white | 5.74:1 | AA | Lc 78.6 | Fine for body text |
| #4166A3 text on black | 3.65:1 | AA large text | Lc -23.2 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#AEC2E2
oklch(81% 0.05 259.8)
-
Step 400
400
#83A2D4
oklch(70.8% 0.081 259.8)
-
Step 500
500
#638AC9
oklch(63.1% 0.105 259.7)
-
Step 600
600
#4A73B6
oklch(55.7% 0.114 259.8)
-
Step 700
700 (this color)
#4166A3
oklch(51.2% 0.106 259.9)
-
Step 800
800
#314F7F
oklch(42.8% 0.088 259.4)
-
Step 900
900
#2B4266
oklch(37.8% 0.068 259.1)
-
Step 950
950
#1A273C
oklch(27.2% 0.043 259.7)
#4166A3 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) | #4C6BA5 | 0.020 |
| Deuteranopia (no green cones) | #3F62A2 | 0.012 |
| Tritanopia (no blue cones) | #00747D | 0.092 |
| Achromatopsia (no color) | #666666 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4166A3
#4166A3
oklch(51.2% 0.106 259.9)
- #865E00
#865E00
oklch(51.1% 0.106 79.7)
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 #4166A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.020
- Dusky Blue #475F94 ΔE 0.028
- Mid Blue #276AB3 ΔE 0.031
- Muted Blue #3B719F ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.036
- Denim #3B638C ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.040
- Peacock Blue #016795 ΔE 0.047
Use #4166A3 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.