#405181
Closest named color: Dusk (#4E5481). oklch(44.3% 0.082 268.2), rgb(64, 81, 129).
Aa
White text reads best on this color (7.74:1).
About this color
#405181 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.082 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.023 away. White text reads best on it, at 7.74:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #405181 |
| RGB | rgb(64, 81, 129) |
| HSL | hsl(224, 34%, 38%) |
| OKLCH | oklch(44.3% 0.082 268.2) |
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 #405181 | 7.74:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #405181 | 2.71:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #405181 text on white | 7.74:1 | AAA | Lc 86.8 | Fine for body text |
| #405181 text on black | 2.71:1 | Fails | Lc -15.3 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C0E1
oklch(80.9% 0.049 268.3)
-
Step 400
400
#8C9FD1
oklch(70.6% 0.077 268.3)
-
Step 500
500
#7087C5
oklch(63.1% 0.098 268)
-
Step 600
600
#5970B2
oklch(55.7% 0.106 268.3)
-
Step 700
700
#495D99
oklch(49% 0.1 268.6)
-
Step 800
800 (this color)
#405181
oklch(44.3% 0.082 268.2)
-
Step 900
900
#334064
oklch(37.7% 0.064 268.1)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#405181 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) | #3F5683 | 0.014 |
| Deuteranopia (no green cones) | #385080 | 0.011 |
| Tritanopia (no blue cones) | #255B63 | 0.073 |
| Achromatopsia (no color) | #535353 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405181
#405181
oklch(44.3% 0.082 268.2)
- #665012
#665012
oklch(44.2% 0.082 88)
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 #405181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.023
- Twilight #4E518B ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.030
- Dusk Blue #26538D ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.036
- Dusty Grape #545775 ΔE 0.042
- Light Navy #155084 ΔE 0.043
Use #405181 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.