#331B55
Closest named color: Dark Purple (#35063E). oklch(28.9% 0.101 299), rgb(51, 27, 85).
Aa
White text reads best on this color (14.69:1).
About this color
#331B55 is a dark, moderately saturated purple. In OKLCH its lightness is 29%, its chroma 0.101 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Purple (#35063E), ΔE 0.058 away. White text reads best on it, at 14.69:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Purple (#35063E) |
| Black text | 1.42:1 |
| White text | 14.69:1 |
Values
| HEX | #331B55 |
| RGB | rgb(51, 27, 85) |
| HSL | hsl(265, 52%, 22%) |
| OKLCH | oklch(28.9% 0.101 299) |
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 #331B55 | 14.69:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #331B55 | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #331B55 text on white | 14.69:1 | AAA | Lc 101.2 | Preferred for body text |
| #331B55 text on black | 1.42:1 | 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 950.
-
Step 50
50
#F7F3FF
oklch(97.1% 0.016 301.2)
-
Step 100
100
#EDE5FE
oklch(93.6% 0.035 300.3)
-
Step 200
200
#DFD0FF
oklch(88.5% 0.066 299.6)
-
Step 300
300
#CAB1FF
oklch(81% 0.111 298.6)
-
Step 400
400
#B183FF
oklch(70.7% 0.179 298.9)
-
Step 500
500
#A05BFF
oklch(63.1% 0.232 298.9)
-
Step 600
600
#8E2EF4
oklch(55.6% 0.265 299)
-
Step 700
700
#791BD5
oklch(49.1% 0.247 298.8)
-
Step 800
800
#621DAC
oklch(42.7% 0.204 298.8)
-
Step 900
900
#502288
oklch(37.8% 0.159 299.1)
-
Step 950
950 (this color)
#331B55
oklch(28.9% 0.101 299)
#331B55 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) | #002857 | 0.073 |
| Deuteranopia (no green cones) | #032854 | 0.071 |
| Tritanopia (no blue cones) | #2B2835 | 0.077 |
| Achromatopsia (no color) | #282828 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #331B55
#331B55
oklch(28.9% 0.101 299)
- #282F00
#282F00
oklch(28.8% 0.067 118.3)
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 #331B55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Purple #35063E ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.060
- Eggplant Purple #430541 ΔE 0.062
- Deep Violet #490648 ΔE 0.062
- Deep Purple #36013F ΔE 0.064
- Plum Purple #4E0550 ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.068
- Eggplant #380835 ΔE 0.069
Use #331B55 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.