#331A5A
Closest named color: Dark Indigo (#1F0954). oklch(29.2% 0.109 297), rgb(51, 26, 90).
Aa
White text reads best on this color (14.62:1).
About this color
#331A5A is a dark, moderately saturated purple. In OKLCH its lightness is 29%, its chroma 0.109 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.059 away. White text reads best on it, at 14.62:1.
| Hue family | Purples |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.43:1 |
| White text | 14.62:1 |
Values
| HEX | #331A5A |
| RGB | rgb(51, 26, 90) |
| HSL | hsl(263, 55%, 23%) |
| OKLCH | oklch(29.2% 0.109 297) |
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 #331A5A | 14.62:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #331A5A | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #331A5A text on white | 14.62:1 | AAA | Lc 101.1 | Preferred for body text |
| #331A5A text on black | 1.43:1 | 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
#F6F3FF
oklch(97% 0.016 297.5)
-
Step 100
100
#ECE6FF
oklch(93.7% 0.034 296.7)
-
Step 200
200
#DDD1FF
oklch(88.5% 0.064 297)
-
Step 300
300
#C8B2FF
oklch(81% 0.109 297)
-
Step 400
400
#AD85FF
oklch(70.7% 0.175 296.8)
-
Step 500
500
#9C5EFF
oklch(63.1% 0.228 297.1)
-
Step 600
600
#8C22FF
oklch(55.6% 0.283 296.9)
-
Step 700
700
#7800E0
oklch(49.1% 0.266 297)
-
Step 800
800
#6110B5
oklch(42.6% 0.221 296.9)
-
Step 900
900
#4F1D8F
oklch(37.7% 0.172 297.1)
-
Step 950
950 (this color)
#331A5A
oklch(29.2% 0.109 297)
#331A5A 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) | #00295C | 0.073 |
| Deuteranopia (no green cones) | #002859 | 0.073 |
| Tritanopia (no blue cones) | #292937 | 0.085 |
| Achromatopsia (no color) | #292929 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #331A5A
#331A5A
oklch(29.2% 0.109 297)
- #2A3000
#2A3000
oklch(29.3% 0.068 117)
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 #331A5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.059
- Midnight Blue #191970 ΔE 0.063
- Dark Purple #35063E ΔE 0.064
- Deep Violet #490648 ΔE 0.065
- Royal Purple #4B006E ΔE 0.066
- Eggplant Purple #430541 ΔE 0.067
- Plum Purple #4E0550 ΔE 0.068
- Deep Purple #36013F ΔE 0.068
Use #331A5A 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.