#3B3757
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.055 289), rgb(59, 55, 87).
Aa
White text reads best on this color (11.22:1).
About this color
#3B3757 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.055 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 11.22:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #3B3757 |
| RGB | rgb(59, 55, 87) |
| HSL | hsl(248, 23%, 28%) |
| OKLCH | oklch(35.6% 0.055 289) |
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 #3B3757 | 11.22:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #3B3757 | 1.87:1 | Fails | Lc 8.0 | Not readable |
| #3B3757 text on white | 11.22:1 | AAA | Lc 95.9 | Preferred for body text |
| #3B3757 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
#BFBDDA
oklch(80.9% 0.041 288.6)
-
Step 400
400
#9F9AC8
oklch(70.7% 0.067 289.6)
-
Step 500
500
#8881BA
oklch(63.1% 0.085 289.4)
-
Step 600
600
#726AA6
oklch(55.7% 0.092 289.2)
-
Step 700
700
#5F588E
oklch(49.1% 0.085 288.8)
-
Step 800
800
#4E4873
oklch(42.7% 0.07 289.5)
-
Step 900
900 (this color)
#3B3757
oklch(35.6% 0.055 289)
-
Step 950
950
#262436
oklch(27.1% 0.033 289.1)
#3B3757 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) | #2E3C58 | 0.024 |
| Deuteranopia (no green cones) | #2E3A56 | 0.022 |
| Tritanopia (no blue cones) | #343D43 | 0.047 |
| Achromatopsia (no color) | #3B3B3B | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3757
#3B3757
oklch(35.6% 0.055 289)
- #3E3E1A
#3E3E1A
oklch(35.5% 0.054 108.9)
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 #3B3757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.045
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.050
- Gunmetal #293241 ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.056
Use #3B3757 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.