#404D7F
Closest named color: Dusk (#4E5481). oklch(43.3% 0.084 271.5), rgb(64, 77, 127).
Aa
White text reads best on this color (8.12:1).
About this color
#404D7F is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.084 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.031 away. White text reads best on it, at 8.12:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.58:1 |
| White text | 8.12:1 |
Values
| HEX | #404D7F |
| RGB | rgb(64, 77, 127) |
| HSL | hsl(228, 33%, 37%) |
| OKLCH | oklch(43.3% 0.084 271.5) |
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 #404D7F | 8.12:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #404D7F | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #404D7F text on white | 8.12:1 | AAA | Lc 88.0 | Fine for body text |
| #404D7F text on black | 2.58:1 | Fails | Lc -14.1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B5BFE1
oklch(80.8% 0.049 272.4)
-
Step 400
400
#8F9ED3
oklch(70.7% 0.08 272)
-
Step 500
500
#7385C7
oklch(63% 0.102 271.6)
-
Step 600
600
#5C6EB3
oklch(55.5% 0.11 271.4)
-
Step 700
700
#4C5C9A
oklch(49.1% 0.101 271.3)
-
Step 800
800 (this color)
#404D7F
oklch(43.3% 0.084 271.5)
-
Step 900
900
#353F65
oklch(37.7% 0.067 271.7)
-
Step 950
950
#1F253B
oklch(27% 0.042 271.7)
#404D7F 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) | #3A5281 | 0.015 |
| Deuteranopia (no green cones) | #344D7E | 0.016 |
| Tritanopia (no blue cones) | #275760 | 0.074 |
| Achromatopsia (no color) | #505050 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404D7F
#404D7F
oklch(43.3% 0.084 271.5)
- #624E09
#624E09
oklch(43.3% 0.084 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 #404D7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.031
- Twilight #4E518B ΔE 0.031
- Dusk Blue #26538D ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.040
- Light Navy #155084 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
- Dusty Grape #545775 ΔE 0.050
Use #404D7F 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.