#404B9E
Closest named color: Blueberry (#464196). oklch(45% 0.134 274), rgb(64, 75, 158).
Aa
White text reads best on this color (7.72:1).
About this color
#404B9E is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.134 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.028 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #404B9E |
| RGB | rgb(64, 75, 158) |
| HSL | hsl(233, 42%, 44%) |
| OKLCH | oklch(45% 0.134 274) |
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 #404B9E | 7.72:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #404B9E | 2.71:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #404B9E text on white | 7.72:1 | AAA | Lc 86.6 | Fine for body text |
| #404B9E text on black | 2.71:1 | Fails | Lc -15.5 | 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 800.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D0D8F7
oklch(88.6% 0.044 274)
-
Step 300
300
#B0BEF4
oklch(81% 0.078 273.3)
-
Step 400
400
#899AEE
oklch(70.8% 0.124 274.1)
-
Step 500
500
#6D7EE9
oklch(63.1% 0.161 274.1)
-
Step 600
600
#5765D7
oklch(55.7% 0.174 274.1)
-
Step 700
700
#4753BA
oklch(49.1% 0.161 273.9)
-
Step 800
800 (this color)
#404B9E
oklch(45% 0.134 274)
-
Step 900
900
#323B78
oklch(37.8% 0.104 274.1)
-
Step 950
950
#1D2346
oklch(27.1% 0.065 273.9)
#404B9E 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) | #1C57A1 | 0.043 |
| Deuteranopia (no green cones) | #054F9C | 0.048 |
| Tritanopia (no blue cones) | #005E6D | 0.118 |
| Achromatopsia (no color) | #535353 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404B9E
#404B9E
oklch(45% 0.134 274)
- #665300
#665300
oklch(44.8% 0.092 93.6)
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 #404B9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.028
- Twilight #4E518B ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk Blue #26538D ΔE 0.047
- Cobalt #1E488F ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.051
- Dusk #4E5481 ΔE 0.062
- Light Navy Blue #2E5A88 ΔE 0.062
Use #404B9E 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.