#4066B8
Closest named color: French Blue (#436BAD). oklch(52.4% 0.136 263.7), rgb(64, 102, 184).
Aa
White text reads best on this color (5.51:1).
About this color
#4066B8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.136 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.81:1 |
| White text | 5.51:1 |
Values
| HEX | #4066B8 |
| RGB | rgb(64, 102, 184) |
| HSL | hsl(221, 48%, 49%) |
| OKLCH | oklch(52.4% 0.136 263.7) |
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 #4066B8 | 5.51:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #4066B8 | 3.81:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #4066B8 text on white | 5.51:1 | AA | Lc 77.3 | Fine for body text |
| #4066B8 text on black | 3.81:1 | AA large text | Lc -24.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E9
oklch(80.9% 0.061 263.2)
-
Step 400
400
#81A0DE
oklch(70.7% 0.098 263.6)
-
Step 500
500
#6287D5
oklch(63.1% 0.125 263.9)
-
Step 600
600 (this color)
#4066B8
oklch(52.4% 0.136 263.7)
-
Step 700
700
#3A5DA8
oklch(49.1% 0.127 263.6)
-
Step 800
800
#304C88
oklch(42.6% 0.105 263.7)
-
Step 900
900
#2B406D
oklch(37.7% 0.082 264)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#4066B8 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) | #3F6FBB | 0.024 |
| Deuteranopia (no green cones) | #2B64B6 | 0.021 |
| Tritanopia (no blue cones) | #007986 | 0.114 |
| Achromatopsia (no color) | #696969 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4066B8
#4066B8
oklch(52.4% 0.136 263.7)
- #886300
#886300
oklch(52.4% 0.108 82.9)
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 #4066B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Mid Blue #276AB3 ΔE 0.025
- Windows Blue #3778BF ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.049
- Muted Blue #3B719F ΔE 0.056
- Dusky Blue #475F94 ΔE 0.057
- Iris #6258C4 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.063
Use #4066B8 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.