#5B31A1
Closest named color: Rebecca Purple (#663399). oklch(43.1% 0.171 295.5), rgb(91, 49, 161).
Aa
White text reads best on this color (8.75:1).
About this color
#5B31A1 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.171 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.026 away. White text reads best on it, at 8.75:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #5B31A1 |
| RGB | rgb(91, 49, 161) |
| HSL | hsl(263, 53%, 41%) |
| OKLCH | oklch(43.1% 0.171 295.5) |
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 #5B31A1 | 8.75:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #5B31A1 | 2.39:1 | Fails | Lc 14.6 | Not readable |
| #5B31A1 text on white | 8.75:1 | AAA | Lc 89.4 | Fine for body text |
| #5B31A1 text on black | 2.39:1 | Fails | Lc -12.9 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#EBE6FC
oklch(93.5% 0.03 296.2)
-
Step 200
200
#DBD2FB
oklch(88.4% 0.057 295.3)
-
Step 300
300
#C5B4FA
oklch(80.9% 0.099 295.2)
-
Step 400
400
#AA89F8
oklch(70.7% 0.16 295.7)
-
Step 500
500
#9667F5
oklch(63.2% 0.204 295.2)
-
Step 600
600
#8248E3
oklch(55.5% 0.221 295.4)
-
Step 700
700
#6F37C5
oklch(49% 0.206 295.8)
-
Step 800
800 (this color)
#5B31A1
oklch(43.1% 0.171 295.5)
-
Step 900
900
#492C7F
oklch(37.6% 0.134 295.3)
-
Step 950
950
#2B1B4A
oklch(27% 0.084 296)
#5B31A1 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) | #004CA4 | 0.108 |
| Deuteranopia (no green cones) | #00499F | 0.107 |
| Tritanopia (no blue cones) | #484C65 | 0.132 |
| Achromatopsia (no color) | #4B4B4B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B31A1
#5B31A1
oklch(43.1% 0.171 295.5)
- #4E5600
#4E5600
oklch(43.1% 0.098 115.8)
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 #5B31A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.026
- Blueberry #464196 ΔE 0.051
- Chrysanthemum #560BAD ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.054
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Grape #7209B7 ΔE 0.066
- Imperial Purple #480CA8 ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.070
Use #5B31A1 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.