#404C74
Closest named color: Dusk (#4E5481). oklch(42.4% 0.069 270.6), rgb(64, 76, 116).
Aa
White text reads best on this color (8.38:1).
About this color
#404C74 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.037 away. White text reads best on it, at 8.38:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.50:1 |
| White text | 8.38:1 |
Values
| HEX | #404C74 |
| RGB | rgb(64, 76, 116) |
| HSL | hsl(226, 29%, 35%) |
| OKLCH | oklch(42.4% 0.069 270.6) |
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 #404C74 | 8.38:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #404C74 | 2.50:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #404C74 text on white | 8.38:1 | AAA | Lc 88.9 | Fine for body text |
| #404C74 text on black | 2.50:1 | Fails | Lc -13.3 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF2
oklch(93.7% 0.011 269.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B7C0DB
oklch(80.9% 0.039 270.9)
-
Step 400
400
#919FC9
oklch(70.7% 0.064 270.4)
-
Step 500
500
#7787BC
oklch(63.2% 0.082 271)
-
Step 600
600
#5F70A8
oklch(55.5% 0.09 270.4)
-
Step 700
700
#4F5E90
oklch(49.2% 0.083 270.4)
-
Step 800
800 (this color)
#404C74
oklch(42.4% 0.069 270.6)
-
Step 900
900
#37405E
oklch(37.7% 0.053 270.9)
-
Step 950
950
#202637
oklch(27.1% 0.033 269.2)
#404C74 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) | #3E5076 | 0.012 |
| Deuteranopia (no green cones) | #394B73 | 0.011 |
| Tritanopia (no blue cones) | #2E545A | 0.062 |
| Achromatopsia (no color) | #4E4E4E | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C74
#404C74
oklch(42.4% 0.069 270.6)
- #5D4D1D
#5D4D1D
oklch(42.6% 0.069 90.7)
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 #404C74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.042
- Twilight #4E518B ΔE 0.045
- Dusty Grape #545775 ΔE 0.047
- Light Navy #155084 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Dusk Blue #26538D ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.053
Use #404C74 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.