#31155A
Closest named color: Dark Indigo (#1F0954). oklch(28.2% 0.116 296.8), rgb(49, 21, 90).
Aa
White text reads best on this color (15.15:1).
About this color
#31155A is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.116 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 0.049 away. White text reads best on it, at 15.15:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.38:1 |
| White text | 15.15:1 |
Values
| HEX | #31155A |
| RGB | rgb(49, 21, 90) |
| HSL | hsl(264, 62%, 22%) |
| OKLCH | oklch(28.2% 0.116 296.8) |
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 #31155A | 15.15:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #31155A | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #31155A text on white | 15.15:1 | AAA | Lc 101.6 | Preferred for body text |
| #31155A text on black | 1.38:1 | 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
#C7B2FF
oklch(80.9% 0.109 296.4)
-
Step 400
400
#AD85FF
oklch(70.7% 0.175 296.8)
-
Step 500
500
#9B5EFF
oklch(63% 0.228 296.8)
-
Step 600
600
#8C23FF
oklch(55.6% 0.282 296.9)
-
Step 700
700
#7800E1
oklch(49.2% 0.267 296.8)
-
Step 800
800
#6200BA
oklch(42.6% 0.232 296.7)
-
Step 900
900
#501794
oklch(37.8% 0.183 296.9)
-
Step 950
950 (this color)
#31155A
oklch(28.2% 0.116 296.8)
#31155A 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) | #00265C | 0.074 |
| Deuteranopia (no green cones) | #002559 | 0.074 |
| Tritanopia (no blue cones) | #262636 | 0.088 |
| Achromatopsia (no color) | #262626 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31155A
#31155A
oklch(28.2% 0.116 296.8)
- #272D00
#272D00
oklch(28.1% 0.065 117.3)
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 #31155A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.049
- Dark Purple #35063E ΔE 0.059
- Midnight Blue #191970 ΔE 0.061
- Deep Purple #36013F ΔE 0.063
- Eggplant Purple #430541 ΔE 0.066
- Royal Purple #4B006E ΔE 0.067
- Deep Violet #490648 ΔE 0.067
- Plum Purple #4E0550 ΔE 0.070
Use #31155A 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.