#404BA3
Closest named color: Blueberry (#464196). oklch(45.3% 0.141 274), rgb(64, 75, 163).
Aa
White text reads best on this color (7.62:1).
About this color
#404BA3 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.141 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.032 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #404BA3 |
| RGB | rgb(64, 75, 163) |
| HSL | hsl(233, 44%, 45%) |
| OKLCH | oklch(45.3% 0.141 274) |
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 #404BA3 | 7.62:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #404BA3 | 2.75:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #404BA3 text on white | 7.62:1 | AAA | Lc 86.2 | Fine for body text |
| #404BA3 text on black | 2.75:1 | Fails | Lc -15.9 | 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
#CFD8F8
oklch(88.5% 0.045 273)
-
Step 300
300
#B0BDF7
oklch(80.9% 0.083 274.6)
-
Step 400
400
#8799F2
oklch(70.6% 0.132 273.9)
-
Step 500
500
#6C7DEE
oklch(63.1% 0.169 274.1)
-
Step 600
600
#5663DC
oklch(55.6% 0.183 274.2)
-
Step 700
700
#4651BF
oklch(49% 0.171 273.9)
-
Step 800
800 (this color)
#404BA3
oklch(45.3% 0.141 274)
-
Step 900
900
#313A7B
oklch(37.8% 0.11 274)
-
Step 950
950
#1C2248
oklch(26.9% 0.07 274)
#404BA3 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) | #1458A6 | 0.047 |
| Deuteranopia (no green cones) | #004FA1 | 0.049 |
| Tritanopia (no blue cones) | #005F6F | 0.122 |
| Achromatopsia (no color) | #545454 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404BA3
#404BA3
oklch(45.3% 0.141 274)
- #675400
#675400
oklch(45.2% 0.093 93.7)
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 #404BA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.032
- Twilight #4E518B ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.051
- Dusk Blue #26538D ΔE 0.052
- Cobalt #1E488F ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.055
- Sapphire #2138AB ΔE 0.066
- Dusky Blue #475F94 ΔE 0.066
Use #404BA3 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.