#404B6F
Closest named color: Dusk (#4E5481). oklch(41.9% 0.062 270.6), rgb(64, 75, 111).
Aa
White text reads best on this color (8.55:1).
About this color
#404B6F is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.062 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.044 away. White text reads best on it, at 8.55:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #404B6F |
| RGB | rgb(64, 75, 111) |
| HSL | hsl(226, 27%, 34%) |
| OKLCH | oklch(41.9% 0.062 270.6) |
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 #404B6F | 8.55:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #404B6F | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #404B6F text on white | 8.55:1 | AAA | Lc 89.4 | Fine for body text |
| #404B6F text on black | 2.45:1 | Fails | Lc -12.9 | 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
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B7C0D9
oklch(80.9% 0.037 269.8)
-
Step 400
400
#939FC6
oklch(70.7% 0.059 271.5)
-
Step 500
500
#7887B7
oklch(63% 0.075 270.8)
-
Step 600
600
#6171A3
oklch(55.6% 0.08 270.1)
-
Step 700
700
#515E8C
oklch(49.1% 0.076 271.3)
-
Step 800
800 (this color)
#404B6F
oklch(41.9% 0.062 270.6)
-
Step 900
900
#38405C
oklch(37.7% 0.049 271.6)
-
Step 950
950
#212636
oklch(27.1% 0.031 270.8)
#404B6F 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) | #3F4E71 | 0.009 |
| Deuteranopia (no green cones) | #3B4A6E | 0.008 |
| Tritanopia (no blue cones) | #315258 | 0.055 |
| Achromatopsia (no color) | #4C4C4C | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404B6F
#404B6F
oklch(41.9% 0.062 270.6)
- #5A4B22
#5A4B22
oklch(41.9% 0.062 89.5)
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 #404B6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.049
- Dusty Grape #545775 ΔE 0.049
- Light Navy #155084 ΔE 0.052
- Twilight #4E518B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.054
- Dusk Blue #26538D ΔE 0.055
Use #404B6F 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.