#3F485B
Closest named color: Dark Grey Blue (#29465B). oklch(40.1% 0.034 265), rgb(63, 72, 91).
Aa
White text reads best on this color (9.17:1).
About this color
#3F485B is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.034 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #3F485B |
| RGB | rgb(63, 72, 91) |
| HSL | hsl(221, 18%, 30%) |
| OKLCH | oklch(40.1% 0.034 265) |
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 #3F485B | 9.17:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #3F485B | 2.28:1 | Fails | Lc 12.8 | Not readable |
| #3F485B text on white | 9.17:1 | AAA | Lc 91.1 | Preferred for body text |
| #3F485B text on black | 2.28:1 | Fails | Lc -11.2 | 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 900.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E3
oklch(88.4% 0.015 264.5)
-
Step 300
300
#B8C1D2
oklch(80.9% 0.026 263.3)
-
Step 400
400
#94A1BB
oklch(70.8% 0.041 264.3)
-
Step 500
500
#7A89AA
oklch(63% 0.053 265.8)
-
Step 600
600
#637395
oklch(55.6% 0.057 265)
-
Step 700
700
#52607F
oklch(49% 0.053 265.6)
-
Step 800
800
#434F68
oklch(42.8% 0.044 264.6)
-
Step 900
900 (this color)
#3F485B
oklch(40.1% 0.034 265)
-
Step 950
950
#212631
oklch(26.9% 0.022 265.8)
#3F485B 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) | #42495C | 0.006 |
| Deuteranopia (no green cones) | #3F475B | 0.003 |
| Tritanopia (no blue cones) | #374C4E | 0.032 |
| Achromatopsia (no color) | #484848 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F485B
#3F485B
oklch(40.1% 0.034 265)
- #514733
#514733
oklch(40.2% 0.034 84.3)
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 #3F485B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Charcoal #264653 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.043
- Onyx #343A40 ΔE 0.060
- Deep Teal #00555A ΔE 0.063
- YInMn Blue #415A77 ΔE 0.063
- Dark Teal #014D4E ΔE 0.064
Use #3F485B 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.