#404380
Closest named color: Dark Slate Blue (#483D8B). oklch(41.2% 0.101 278.9), rgb(64, 67, 128).
Aa
White text reads best on this color (9.00:1).
About this color
#404380 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.101 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #404380 |
| RGB | rgb(64, 67, 128) |
| HSL | hsl(237, 33%, 38%) |
| OKLCH | oklch(41.2% 0.101 278.9) |
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 #404380 | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #404380 | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #404380 text on white | 9.00:1 | AAA | Lc 90.5 | Preferred for body text |
| #404380 text on black | 2.33:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EF
oklch(88.4% 0.033 280)
-
Step 300
300
#B8BDE7
oklch(80.9% 0.059 279.7)
-
Step 400
400
#949BDB
oklch(70.8% 0.094 278.9)
-
Step 500
500
#7A81D1
oklch(63.2% 0.12 278.6)
-
Step 600
600
#6469BE
oklch(55.7% 0.13 278.7)
-
Step 700
700
#5357A4
oklch(49.2% 0.121 278.7)
-
Step 800
800 (this color)
#404380
oklch(41.2% 0.101 278.9)
-
Step 900
900
#393C6A
oklch(37.6% 0.078 279.1)
-
Step 950
950
#21233E
oklch(26.8% 0.05 279.2)
#404380 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) | #2A4C82 | 0.035 |
| Deuteranopia (no green cones) | #24477F | 0.036 |
| Tritanopia (no blue cones) | #28505B | 0.088 |
| Achromatopsia (no color) | #494949 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404380
#404380
oklch(41.2% 0.101 278.9)
- #574B00
#574B00
oklch(41.2% 0.085 98.7)
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 #404380, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.039
- Cobalt #1E488F ΔE 0.045
- Twilight #4E518B ΔE 0.048
- Dusk Blue #26538D ΔE 0.051
- Light Navy #155084 ΔE 0.053
- Dusk #4E5481 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.057
Use #404380 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.