#3F4464
Closest named color: Dark Grey Blue (#29465B). oklch(39.6% 0.054 276.8), rgb(63, 68, 100).
Aa
White text reads best on this color (9.45:1).
About this color
#3F4464 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.054 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 9.45:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #3F4464 |
| RGB | rgb(63, 68, 100) |
| HSL | hsl(232, 23%, 32%) |
| OKLCH | oklch(39.6% 0.054 276.8) |
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 #3F4464 | 9.45:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #3F4464 | 2.22:1 | Fails | Lc 12.1 | Not readable |
| #3F4464 text on white | 9.45:1 | AAA | Lc 91.8 | Preferred for body text |
| #3F4464 text on black | 2.22:1 | Fails | Lc -10.6 | 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 900.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#B9BFDC
oklch(80.9% 0.041 276.2)
-
Step 400
400
#969DCA
oklch(70.7% 0.066 277.7)
-
Step 500
500
#7C85BC
oklch(63.1% 0.083 276.6)
-
Step 600
600
#666EA8
oklch(55.6% 0.09 277)
-
Step 700
700
#545C90
oklch(49.1% 0.084 276.2)
-
Step 800
800
#454B75
oklch(42.7% 0.07 276.8)
-
Step 900
900 (this color)
#3F4464
oklch(39.6% 0.054 276.8)
-
Step 950
950
#222537
oklch(27% 0.034 276.6)
#3F4464 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) | #3A4765 | 0.011 |
| Deuteranopia (no green cones) | #384563 | 0.011 |
| Tritanopia (no blue cones) | #354A4F | 0.049 |
| Achromatopsia (no color) | #464646 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4464
#3F4464
oklch(39.6% 0.054 276.8)
- #4F4723
#4F4723
oklch(39.7% 0.054 97.1)
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 #3F4464, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal #264653 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.058
- Dark Slate Gray #2F4F4F ΔE 0.062
- Twilight Blue #0A437A ΔE 0.065
- Light Navy #155084 ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.067
- Dusk #4E5481 ΔE 0.067
Use #3F4464 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.