#3B3F5E
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.053 277.9), rgb(59, 63, 94).
Aa
White text reads best on this color (10.20:1).
About this color
#3B3F5E is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.053 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.033 away. White text reads best on it, at 10.20:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #3B3F5E |
| RGB | rgb(59, 63, 94) |
| HSL | hsl(233, 23%, 30%) |
| OKLCH | oklch(37.8% 0.053 277.9) |
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 #3B3F5E | 10.20:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #3B3F5E | 2.05:1 | Fails | Lc 10.3 | Not readable |
| #3B3F5E text on white | 10.20:1 | AAA | Lc 93.7 | Preferred for body text |
| #3B3F5E text on black | 2.05:1 | Fails | Lc -8.9 | 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
#D5D8E8
oklch(88.5% 0.022 277.5)
-
Step 300
300
#BABFDB
oklch(81% 0.04 277.5)
-
Step 400
400
#979DC9
oklch(70.7% 0.065 278.6)
-
Step 500
500
#7D85BB
oklch(63.1% 0.082 277.3)
-
Step 600
600
#676EA7
oklch(55.6% 0.089 277.7)
-
Step 700
700
#565C8F
oklch(49.2% 0.082 277.8)
-
Step 800
800
#464B74
oklch(42.7% 0.068 277.8)
-
Step 900
900 (this color)
#3B3F5E
oklch(37.8% 0.053 277.9)
-
Step 950
950
#222537
oklch(27% 0.034 276.6)
#3B3F5E 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) | #35425F | 0.012 |
| Deuteranopia (no green cones) | #33405D | 0.012 |
| Tritanopia (no blue cones) | #31454A | 0.048 |
| Achromatopsia (no color) | #414141 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3F5E
#3B3F5E
oklch(37.8% 0.053 277.9)
- #49421F
#49421F
oklch(37.7% 0.053 98.3)
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 #3B3F5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Onyx #343A40 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.057
- Twilight Blue #0A437A ΔE 0.064
- Dark Slate Gray #2F4F4F ΔE 0.066
Use #3B3F5E 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.