#404369
Closest named color: Dark Grey Blue (#29465B). oklch(39.8% 0.064 279.6), rgb(64, 67, 105).
Aa
White text reads best on this color (9.43:1).
About this color
#404369 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.064 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.043 away. White text reads best on it, at 9.43:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #404369 |
| RGB | rgb(64, 67, 105) |
| HSL | hsl(236, 24%, 33%) |
| OKLCH | oklch(39.8% 0.064 279.6) |
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 #404369 | 9.43:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #404369 | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #404369 text on white | 9.43:1 | AAA | Lc 91.8 | Preferred for body text |
| #404369 text on black | 2.22:1 | Fails | Lc -10.6 | Not readable |
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 900.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E8E9F3
oklch(93.6% 0.013 281.6)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#BABEE0
oklch(80.9% 0.048 280)
-
Step 400
400
#969CD0
oklch(70.7% 0.076 279.1)
-
Step 500
500
#7D83C4
oklch(63.1% 0.098 279.2)
-
Step 600
600
#676BB1
oklch(55.6% 0.108 279.8)
-
Step 700
700
#565998
oklch(49.1% 0.1 280)
-
Step 800
800
#46497B
oklch(42.6% 0.082 279.7)
-
Step 900
900 (this color)
#404369
oklch(39.8% 0.064 279.6)
-
Step 950
950
#22243A
oklch(26.9% 0.041 279.3)
#404369 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) | #37486B | 0.018 |
| Deuteranopia (no green cones) | #344568 | 0.018 |
| Tritanopia (no blue cones) | #344A51 | 0.056 |
| Achromatopsia (no color) | #464646 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404369
#404369
oklch(39.8% 0.064 279.6)
- #4F481B
#4F481B
oklch(39.8% 0.064 100.5)
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 #404369, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.043
- Charcoal #264653 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.061
- Light Navy #155084 ΔE 0.064
- Dusk #4E5481 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.064
- Charcoal Grey #3C4142 ΔE 0.067
- YInMn Blue #415A77 ΔE 0.069
Use #404369 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.