#404E75
Closest named color: Dusk (#4E5481). oklch(43% 0.067 268.4), rgb(64, 78, 117).
Aa
White text reads best on this color (8.18:1).
About this color
#404E75 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.067 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.033 away. White text reads best on it, at 8.18:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #404E75 |
| RGB | rgb(64, 78, 117) |
| HSL | hsl(224, 29%, 35%) |
| OKLCH | oklch(43% 0.067 268.4) |
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 #404E75 | 8.18:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #404E75 | 2.56:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #404E75 text on white | 8.18:1 | AAA | Lc 88.3 | Fine for body text |
| #404E75 text on black | 2.56:1 | Fails | Lc -13.9 | 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
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D3D9E8
oklch(88.5% 0.022 268.4)
-
Step 300
300
#B6C0DB
oklch(80.9% 0.04 269.4)
-
Step 400
400
#90A0C9
oklch(70.8% 0.063 268.1)
-
Step 500
500
#7588BB
oklch(63.2% 0.08 268.3)
-
Step 600
600
#5E71A7
oklch(55.6% 0.087 268.7)
-
Step 700
700
#4D5E8F
oklch(49% 0.082 268.7)
-
Step 800
800 (this color)
#404E75
oklch(43% 0.067 268.4)
-
Step 900
900
#36405E
oklch(37.6% 0.053 269.6)
-
Step 950
950
#1F2637
oklch(27% 0.033 266.9)
#404E75 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) | #405277 | 0.012 |
| Deuteranopia (no green cones) | #3B4D74 | 0.008 |
| Tritanopia (no blue cones) | #2D565C | 0.061 |
| Achromatopsia (no color) | #4F4F4F | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404E75
#404E75
oklch(43% 0.067 268.4)
- #5F4D20
#5F4D20
oklch(42.9% 0.067 87.4)
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 #404E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.036
- Dusty Grape #545775 ΔE 0.043
- Twilight #4E518B ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Light Navy #155084 ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.051
Use #404E75 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.