#4166A5
Closest named color: French Blue (#436BAD). oklch(51.3% 0.109 260.5), rgb(65, 102, 165).
Aa
White text reads best on this color (5.72:1).
About this color
#4166A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.109 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.018 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #4166A5 |
| RGB | rgb(65, 102, 165) |
| HSL | hsl(218, 43%, 45%) |
| OKLCH | oklch(51.3% 0.109 260.5) |
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 #4166A5 | 5.72:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #4166A5 | 3.66:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #4166A5 text on white | 5.72:1 | AA | Lc 78.5 | Fine for body text |
| #4166A5 text on black | 3.66:1 | AA large text | Lc -23.3 | 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
#ADC2E3
oklch(80.9% 0.052 259.4)
-
Step 400
400
#82A1D6
oklch(70.6% 0.085 260.9)
-
Step 500
500
#6389CB
oklch(63% 0.109 261)
-
Step 600
600
#4A72B7
oklch(55.5% 0.117 260.7)
-
Step 700
700 (this color)
#4166A5
oklch(51.3% 0.109 260.5)
-
Step 800
800
#314E80
oklch(42.6% 0.091 260.7)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#4166A5 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) | #4B6BA8 | 0.020 |
| Deuteranopia (no green cones) | #3E62A4 | 0.012 |
| Tritanopia (no blue cones) | #00747D | 0.094 |
| Achromatopsia (no color) | #666666 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4166A5
#4166A5
oklch(51.3% 0.109 260.5)
- #865F00
#865F00
oklch(51.3% 0.106 80.6)
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 #4166A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.018
- Mid Blue #276AB3 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.030
- Muted Blue #3B719F ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.036
- Denim #3B638C ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.041
- Peacock Blue #016795 ΔE 0.049
Use #4166A5 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.