#3F495D
Closest named color: Dark Grey Blue (#29465B). oklch(40.5% 0.036 264), rgb(63, 73, 93).
Aa
White text reads best on this color (9.04:1).
About this color
#3F495D is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.036 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.032 away. White text reads best on it, at 9.04:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #3F495D |
| RGB | rgb(63, 73, 93) |
| HSL | hsl(220, 19%, 31%) |
| OKLCH | oklch(40.5% 0.036 264) |
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 #3F495D | 9.04:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #3F495D | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #3F495D text on white | 9.04:1 | AAA | Lc 90.8 | Preferred for body text |
| #3F495D text on black | 2.32:1 | Fails | Lc -11.5 | 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
#96A1B6
oklch(70.7% 0.033 263.4)
-
Step 500
500
#7C8AA4
oklch(63.1% 0.043 262.8)
-
Step 600
600
#657390
oklch(55.5% 0.048 264.7)
-
Step 700
700
#54617A
oklch(49.1% 0.043 263.3)
-
Step 800
800 (this color)
#3F495D
oklch(40.5% 0.036 264)
-
Step 900
900
#3A4251
oklch(37.8% 0.028 263)
-
Step 950
950
#22262F
oklch(26.9% 0.018 266.3)
#3F495D 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) | #424A5E | 0.006 |
| Deuteranopia (no green cones) | #40485D | 0.003 |
| Tritanopia (no blue cones) | #374D50 | 0.032 |
| Achromatopsia (no color) | #494949 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F495D
#3F495D
oklch(40.5% 0.036 264)
- #524832
#524832
oklch(40.6% 0.037 86.3)
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 #3F495D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal #264653 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.059
- Deep Teal #00555A ΔE 0.062
- Dusty Grape #545775 ΔE 0.064
- Onyx #343A40 ΔE 0.064
Use #3F495D 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.