#404B5E
Closest named color: Dark Grey Blue (#29465B). oklch(41.1% 0.035 261.3), rgb(64, 75, 94).
Aa
White text reads best on this color (8.80:1).
About this color
#404B5E is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.035 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.037 away. White text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #404B5E |
| RGB | rgb(64, 75, 94) |
| HSL | hsl(218, 19%, 31%) |
| OKLCH | oklch(41.1% 0.035 261.3) |
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 #404B5E | 8.80:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #404B5E | 2.38:1 | Fails | Lc 13.9 | Not readable |
| #404B5E text on white | 8.80:1 | AAA | Lc 90.1 | Preferred for body text |
| #404B5E text on black | 2.38:1 | Fails | Lc -12.2 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E1
oklch(88.5% 0.012 264.5)
-
Step 300
300
#B9C1CE
oklch(80.9% 0.02 260.2)
-
Step 400
400
#95A1B6
oklch(70.6% 0.034 261.7)
-
Step 500
500
#7B8AA3
oklch(63% 0.042 260.6)
-
Step 600
600
#64748F
oklch(55.6% 0.046 260.8)
-
Step 700
700
#536179
oklch(49% 0.042 261.1)
-
Step 800
800 (this color)
#404B5E
oklch(41.1% 0.035 261.3)
-
Step 900
900
#394250
oklch(37.7% 0.027 259.2)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#404B5E 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) | #454C5F | 0.009 |
| Deuteranopia (no green cones) | #42495E | 0.007 |
| Tritanopia (no blue cones) | #384F51 | 0.032 |
| Achromatopsia (no color) | #4A4A4A | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404B5E
#404B5E
oklch(41.1% 0.035 261.3)
- #544935
#544935
oklch(41.1% 0.035 82.2)
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 #404B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.040
- Charcoal #264653 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.054
- Dusty Grape #545775 ΔE 0.059
- Deep Teal #00555A ΔE 0.060
- Dusk #4E5481 ΔE 0.064
Use #404B5E 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.