#3F4264
Closest named color: Dark Grey Blue (#29465B). oklch(39.2% 0.058 279.5), rgb(63, 66, 100).
Aa
White text reads best on this color (9.65:1).
About this color
#3F4264 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.058 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.038 away. White text reads best on it, at 9.65:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #3F4264 |
| RGB | rgb(63, 66, 100) |
| HSL | hsl(235, 23%, 32%) |
| OKLCH | oklch(39.2% 0.058 279.5) |
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 #3F4264 | 9.65:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #3F4264 | 2.17:1 | Fails | Lc 11.6 | Not readable |
| #3F4264 text on white | 9.65:1 | AAA | Lc 92.3 | Preferred for body text |
| #3F4264 text on black | 2.17:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#BABEDD
oklch(80.8% 0.044 279.6)
-
Step 400
400
#979CCC
oklch(70.6% 0.07 279.8)
-
Step 500
500
#7E84BE
oklch(63.1% 0.087 279)
-
Step 600
600
#686DAB
oklch(55.7% 0.096 279.3)
-
Step 700
700
#575A92
oklch(49% 0.089 280.2)
-
Step 800
800
#474A77
oklch(42.7% 0.074 279.8)
-
Step 900
900 (this color)
#3F4264
oklch(39.2% 0.058 279.5)
-
Step 950
950
#232438
oklch(26.9% 0.037 281.4)
#3F4264 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) | #374665 | 0.016 |
| Deuteranopia (no green cones) | #354363 | 0.015 |
| Tritanopia (no blue cones) | #35484E | 0.050 |
| Achromatopsia (no color) | #454545 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4264
#3F4264
oklch(39.2% 0.058 279.5)
- #4D461F
#4D461F
oklch(39.2% 0.058 99.3)
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 #3F4264, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal #264653 ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.065
- Onyx #343A40 ΔE 0.066
- Dark Slate Gray #2F4F4F ΔE 0.066
- Light Navy #155084 ΔE 0.069
Use #3F4264 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.