#404D79
Closest named color: Dusk (#4E5481). oklch(43% 0.075 270.5), rgb(64, 77, 121).
Aa
White text reads best on this color (8.21:1).
About this color
#404D79 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.075 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.032 away. White text reads best on it, at 8.21:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #404D79 |
| RGB | rgb(64, 77, 121) |
| HSL | hsl(226, 31%, 36%) |
| OKLCH | oklch(43% 0.075 270.5) |
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 #404D79 | 8.21:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #404D79 | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #404D79 text on white | 8.21:1 | AAA | Lc 88.3 | Fine for body text |
| #404D79 text on black | 2.55:1 | Fails | Lc -13.8 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D3D9EA
oklch(88.6% 0.024 270.3)
-
Step 300
300
#B6C0DE
oklch(81% 0.044 270.8)
-
Step 400
400
#909FCD
oklch(70.7% 0.07 270.5)
-
Step 500
500
#7587C0
oklch(63.2% 0.089 270.3)
-
Step 600
600
#5E70AD
oklch(55.7% 0.097 270.5)
-
Step 700
700
#4D5D94
oklch(49% 0.091 270.5)
-
Step 800
800 (this color)
#404D79
oklch(43% 0.075 270.5)
-
Step 900
900
#364061
oklch(37.8% 0.058 270.6)
-
Step 950
950
#1F2539
oklch(26.9% 0.038 270.9)
#404D79 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) | #3D517B | 0.012 |
| Deuteranopia (no green cones) | #384D78 | 0.011 |
| Tritanopia (no blue cones) | #2B565D | 0.067 |
| Achromatopsia (no color) | #4F4F4F | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404D79
#404D79
oklch(43% 0.075 270.5)
- #5F4E17
#5F4E17
oklch(43% 0.075 91.4)
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 #404D79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.032
- Twilight #4E518B ΔE 0.038
- YInMn Blue #415A77 ΔE 0.041
- Dusk Blue #26538D ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.043
- Light Navy #155084 ΔE 0.044
- Dusty Grape #545775 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.050
Use #404D79 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.