#404E64
Closest named color: YInMn Blue (#415A77). oklch(42.1% 0.041 259.3), rgb(64, 78, 100).
Aa
White text reads best on this color (8.42:1).
About this color
#404E64 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.041 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.042 away. White text reads best on it, at 8.42:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.49:1 |
| White text | 8.42:1 |
Values
| HEX | #404E64 |
| RGB | rgb(64, 78, 100) |
| HSL | hsl(217, 22%, 32%) |
| OKLCH | oklch(42.1% 0.041 259.3) |
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 #404E64 | 8.42:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #404E64 | 2.49:1 | Fails | Lc 15.0 | Not readable |
| #404E64 text on white | 8.42:1 | AAA | Lc 89.0 | Fine for body text |
| #404E64 text on black | 2.49:1 | Fails | Lc -13.2 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B8C1D0
oklch(80.9% 0.023 260.7)
-
Step 400
400
#93A2B9
oklch(70.8% 0.038 258.9)
-
Step 500
500
#788BA8
oklch(63.2% 0.049 258.7)
-
Step 600
600
#617493
oklch(55.6% 0.054 260.1)
-
Step 700
700
#50627D
oklch(49.2% 0.049 258.3)
-
Step 800
800 (this color)
#404E64
oklch(42.1% 0.041 259.3)
-
Step 900
900
#384253
oklch(37.7% 0.032 261)
-
Step 950
950
#212730
oklch(27.1% 0.019 258.4)
#404E64 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) | #464F65 | 0.010 |
| Deuteranopia (no green cones) | #434C64 | 0.007 |
| Tritanopia (no blue cones) | #355355 | 0.038 |
| Achromatopsia (no color) | #4D4D4D | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404E64
#404E64
oklch(42.1% 0.041 259.3)
- #594B34
#594B34
oklch(42.1% 0.04 79.7)
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 #404E64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dusty Grape #545775 ΔE 0.049
- Charcoal #264653 ΔE 0.052
- Dusk #4E5481 ΔE 0.054
- Deep Teal #00555A ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.062
Use #404E64 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.