#6B31A5
Closest named color: Rebecca Purple (#663399). oklch(45.3% 0.178 302.7), rgb(107, 49, 165).
Aa
White text reads best on this color (8.05:1).
About this color
#6B31A5 is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.178 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.021 away. White text reads best on it, at 8.05:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.178) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #6B31A5 |
| RGB | rgb(107, 49, 165) |
| HSL | hsl(270, 54%, 42%) |
| OKLCH | oklch(45.3% 0.178 302.7) |
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 #6B31A5 | 8.05:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #6B31A5 | 2.60:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #6B31A5 text on white | 8.05:1 | AAA | Lc 87.2 | Fine for body text |
| #6B31A5 text on black | 2.60:1 | Fails | Lc -14.9 | 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
#F7F3FD
oklch(97% 0.014 304.1)
-
Step 100
100
#EDE5FB
oklch(93.5% 0.031 302.3)
-
Step 200
200
#E0D1F9
oklch(88.5% 0.057 302.3)
-
Step 300
300
#CEB1F8
oklch(81% 0.103 302.9)
-
Step 400
400
#B584F5
oklch(70.7% 0.166 302.4)
-
Step 500
500
#A45FF1
oklch(63.1% 0.212 302.5)
-
Step 600
600
#903EDF
oklch(55.6% 0.23 302.6)
-
Step 700
700
#7B2EC2
oklch(49.2% 0.214 302.6)
-
Step 800
800 (this color)
#6B31A5
oklch(45.3% 0.178 302.7)
-
Step 900
900
#51277C
oklch(37.6% 0.138 303)
-
Step 950
950
#2F1849
oklch(26.9% 0.088 302.5)
#6B31A5 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) | #004FA8 | 0.132 |
| Deuteranopia (no green cones) | #0050A3 | 0.133 |
| Tritanopia (no blue cones) | #5F4C67 | 0.130 |
| Achromatopsia (no color) | #505050 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B31A5
#6B31A5
oklch(45.3% 0.178 302.7)
- #4B5F00
#4B5F00
oklch(45.2% 0.111 122.7)
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 #6B31A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.021
- Grape #7209B7 ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.064
- Chrysanthemum #560BAD ΔE 0.069
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Blueberry #464196 ΔE 0.075
- Blurple #5539CC ΔE 0.077
- Dark Slate Blue #483D8B ΔE 0.078
Use #6B31A5 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.