#404B5D
Closest named color: Dark Grey Blue (#29465B). oklch(41% 0.033 260.2), rgb(64, 75, 93).
Aa
White text reads best on this color (8.81:1).
About this color
#404B5D is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.033 and its hue 260°. 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 8.81:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #404B5D |
| RGB | rgb(64, 75, 93) |
| HSL | hsl(217, 18%, 31%) |
| OKLCH | oklch(41% 0.033 260.2) |
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 #404B5D | 8.81:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #404B5D | 2.38:1 | Fails | Lc 13.8 | Not readable |
| #404B5D text on white | 8.81:1 | AAA | Lc 90.2 | Preferred for body text |
| #404B5D text on black | 2.38:1 | Fails | Lc -12.1 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#B9C1CE
oklch(80.9% 0.02 260.2)
-
Step 400
400
#95A1B5
oklch(70.6% 0.032 260.7)
-
Step 500
500
#7C8AA2
oklch(63.1% 0.04 261.2)
-
Step 600
600
#65748D
oklch(55.6% 0.043 260.6)
-
Step 700
700
#536178
oklch(49% 0.041 260.3)
-
Step 800
800 (this color)
#404B5D
oklch(41% 0.033 260.2)
-
Step 900
900
#3A4250
oklch(37.7% 0.026 261.6)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#404B5D 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) | #454C5E | 0.009 |
| Deuteranopia (no green cones) | #42495D | 0.007 |
| Tritanopia (no blue cones) | #384F51 | 0.030 |
| Achromatopsia (no color) | #4A4A4A | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404B5D
#404B5D
oklch(41% 0.033 260.2)
- #544936
#544936
oklch(41.1% 0.033 81.1)
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 #404B5D, 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 0.039
- Charcoal #264653 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.049
- YInMn Blue #415A77 ΔE 0.055
- Deep Teal #00555A ΔE 0.059
- Dusty Grape #545775 ΔE 0.059
- Dark Teal #014D4E ΔE 0.065
Use #404B5D 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.