#3B3758
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.057 288.7), rgb(59, 55, 88).
Aa
White text reads best on this color (11.20:1).
About this color
#3B3758 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.057 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.045 away. White text reads best on it, at 11.20:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.20:1 |
Values
| HEX | #3B3758 |
| RGB | rgb(59, 55, 88) |
| HSL | hsl(247, 23%, 28%) |
| OKLCH | oklch(35.6% 0.057 288.7) |
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 #3B3758 | 11.20:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #3B3758 | 1.87:1 | Fails | Lc 8.0 | Not readable |
| #3B3758 text on white | 11.20:1 | AAA | Lc 95.9 | Preferred for body text |
| #3B3758 text on black | 1.87:1 | Fails | Lc 0.0 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D8D7E8
oklch(88.5% 0.023 288.6)
-
Step 300
300
#BFBDDB
oklch(81% 0.042 288.5)
-
Step 400
400
#9E9AC9
oklch(70.6% 0.068 288.4)
-
Step 500
500
#8781BB
oklch(63.1% 0.086 288.4)
-
Step 600
600
#716AA7
oklch(55.6% 0.093 288.2)
-
Step 700
700
#5F588F
oklch(49.1% 0.087 288.6)
-
Step 800
800
#4E4874
oklch(42.7% 0.072 289.2)
-
Step 900
900 (this color)
#3B3758
oklch(35.6% 0.057 288.7)
-
Step 950
950
#262437
oklch(27.1% 0.035 288.7)
#3B3758 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) | #2E3C59 | 0.024 |
| Deuteranopia (no green cones) | #2D3A57 | 0.023 |
| Tritanopia (no blue cones) | #343D43 | 0.048 |
| Achromatopsia (no color) | #3B3B3B | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3758
#3B3758
oklch(35.6% 0.057 288.7)
- #3F3E19
#3F3E19
oklch(35.6% 0.055 107.5)
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 #3B3758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.048
- Onyx #343A40 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
- Gunmetal #293241 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.055
- Charcoal #264653 ΔE 0.057
- Charcoal Grey #3C4142 ΔE 0.057
Use #3B3758 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.