#3F495B
Closest named color: Dark Grey Blue (#29465B). oklch(40.4% 0.033 262.1), rgb(63, 73, 91).
Aa
White text reads best on this color (9.06:1).
About this color
#3F495B is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.033 and its hue 262°. 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 9.06:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #3F495B |
| RGB | rgb(63, 73, 91) |
| HSL | hsl(219, 18%, 30%) |
| OKLCH | oklch(40.4% 0.033 262.1) |
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 #3F495B | 9.06:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #3F495B | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #3F495B text on white | 9.06:1 | AAA | Lc 90.9 | Preferred for body text |
| #3F495B text on black | 2.31:1 | 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
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#96A1B4
oklch(70.6% 0.03 261.4)
-
Step 500
500
#7D8AA2
oklch(63.1% 0.039 262.7)
-
Step 600
600
#66748D
oklch(55.7% 0.042 262)
-
Step 700
700
#546178
oklch(49.1% 0.04 261.8)
-
Step 800
800 (this color)
#3F495B
oklch(40.4% 0.033 262.1)
-
Step 900
900
#3A4250
oklch(37.7% 0.026 261.6)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#3F495B 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) | #434A5C | 0.007 |
| Deuteranopia (no green cones) | #40475B | 0.006 |
| Tritanopia (no blue cones) | #374D4F | 0.030 |
| Achromatopsia (no color) | #494949 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F495B
#3F495B
oklch(40.4% 0.033 262.1)
- #524734
#524734
oklch(40.4% 0.033 81.1)
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 #3F495B, 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 0.038
- Dark Slate Gray #2F4F4F ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.044
- Deep Teal #00555A ΔE 0.061
- YInMn Blue #415A77 ΔE 0.061
- Onyx #343A40 ΔE 0.062
- Dark Teal #014D4E ΔE 0.063
Use #3F495B 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.