#404A5F
Closest named color: Dark Grey Blue (#29465B). oklch(40.9% 0.038 264.9), rgb(64, 74, 95).
Aa
White text reads best on this color (8.88:1).
About this color
#404A5F is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.038 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.035 away. White text reads best on it, at 8.88:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #404A5F |
| RGB | rgb(64, 74, 95) |
| HSL | hsl(221, 19%, 31%) |
| OKLCH | oklch(40.9% 0.038 264.9) |
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 #404A5F | 8.88:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #404A5F | 2.36:1 | Fails | Lc 13.6 | Not readable |
| #404A5F text on white | 8.88:1 | AAA | Lc 90.4 | Preferred for body text |
| #404A5F text on black | 2.36:1 | Fails | Lc -11.9 | 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
#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
#BAC1CF
oklch(81% 0.021 264.4)
-
Step 400
400
#96A1B7
oklch(70.8% 0.035 264.3)
-
Step 500
500
#7C8AA6
oklch(63.2% 0.045 264.2)
-
Step 600
600
#657391
oklch(55.5% 0.05 265.3)
-
Step 700
700
#54617B
oklch(49.2% 0.045 264)
-
Step 800
800 (this color)
#404A5F
oklch(40.9% 0.038 264.9)
-
Step 900
900
#3A4252
oklch(37.8% 0.029 264.1)
-
Step 950
950
#222630
oklch(26.9% 0.02 267.9)
#404A5F 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) | #434B60 | 0.006 |
| Deuteranopia (no green cones) | #40495F | 0.003 |
| Tritanopia (no blue cones) | #374E51 | 0.034 |
| Achromatopsia (no color) | #4A4A4A | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404A5F
#404A5F
oklch(40.9% 0.038 264.9)
- #544932
#544932
oklch(41% 0.039 85.2)
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 #404A5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.043
- Charcoal #264653 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Dusty Grape #545775 ΔE 0.059
- Deep Teal #00555A ΔE 0.062
- Dusk #4E5481 ΔE 0.064
Use #404A5F 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.