#731B91
Closest named color: Purple (#800080). oklch(42.6% 0.185 315.4), rgb(115, 27, 145).
Aa
White text reads best on this color (9.15:1).
About this color
#731B91 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.185 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple (#800080), ΔE 0.044 away. White text reads best on it, at 9.15:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.185) |
| Temperature | in between |
| Nearest name | Purple (#800080) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #731B91 |
| RGB | rgb(115, 27, 145) |
| HSL | hsl(285, 69%, 34%) |
| OKLCH | oklch(42.6% 0.185 315.4) |
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 #731B91 | 9.15:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #731B91 | 2.29:1 | Fails | Lc 14.1 | Not readable |
| #731B91 text on white | 9.15:1 | AAA | Lc 89.9 | Fine for body text |
| #731B91 text on black | 2.29:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F9F3FC
oklch(97.1% 0.013 314.8)
-
Step 100
100
#F2E4F9
oklch(93.6% 0.032 314.7)
-
Step 200
200
#E9CEF5
oklch(88.6% 0.06 315.5)
-
Step 300
300
#DBABF0
oklch(80.8% 0.108 315.4)
-
Step 400
400
#C97BE9
oklch(70.7% 0.173 315.4)
-
Step 500
500
#BA52E2
oklch(63.1% 0.221 315.3)
-
Step 600
600
#A62CCF
oklch(55.6% 0.24 315.6)
-
Step 700
700
#8E1BB4
oklch(49.1% 0.223 315.3)
-
Step 800
800 (this color)
#731B91
oklch(42.6% 0.185 315.4)
-
Step 900
900
#5D2074
oklch(37.7% 0.143 315.2)
-
Step 950
950
#371444
oklch(27% 0.092 315.7)
#731B91 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) | #004394 | 0.165 |
| Deuteranopia (no green cones) | #164A8F | 0.160 |
| Tritanopia (no blue cones) | #713757 | 0.118 |
| Achromatopsia (no color) | #484848 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #731B91
#731B91
oklch(42.6% 0.185 315.4)
- #2C5D00
#2C5D00
oklch(42.7% 0.126 135.4)
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 #731B91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple #800080 ΔE 0.044
- Rebecca Purple #663399 ΔE 0.046
- Dark Magenta #8B008B ΔE 0.053
- Grape #7209B7 ΔE 0.063
- Warm Purple #952E8F ΔE 0.082
- Chrysanthemum #560BAD ΔE 0.083
- Indigo #4B0082 ΔE 0.097
- Rich Purple #720058 ΔE 0.097
Use #731B91 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.