#6431A9
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.181 298.1), rgb(100, 49, 169).
Aa
White text reads best on this color (8.22:1).
About this color
#6431A9 is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.181 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.027 away. White text reads best on it, at 8.22:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #6431A9 |
| RGB | rgb(100, 49, 169) |
| HSL | hsl(266, 55%, 43%) |
| OKLCH | oklch(44.8% 0.181 298.1) |
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 #6431A9 | 8.22:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #6431A9 | 2.55:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #6431A9 text on white | 8.22:1 | AAA | Lc 87.7 | Fine for body text |
| #6431A9 text on black | 2.55:1 | Fails | Lc -14.4 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FC
oklch(93.6% 0.03 298.3)
-
Step 200
200
#DDD1FC
oklch(88.4% 0.06 297.9)
-
Step 300
300
#C9B2FC
oklch(80.9% 0.105 298.3)
-
Step 400
400
#AF86FB
oklch(70.8% 0.169 298.1)
-
Step 500
500
#9D61F8
oklch(63.2% 0.216 298.3)
-
Step 600
600
#8940E7
oklch(55.6% 0.235 298.2)
-
Step 700
700
#7430C9
oklch(49.2% 0.218 297.9)
-
Step 800
800 (this color)
#6431A9
oklch(44.8% 0.181 298.1)
-
Step 900
900
#4D2981
oklch(37.8% 0.141 298.1)
-
Step 950
950
#2D194B
oklch(27% 0.089 298.7)
#6431A9 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) | #004FAD | 0.120 |
| Deuteranopia (no green cones) | #004DA7 | 0.120 |
| Tritanopia (no blue cones) | #534E69 | 0.137 |
| Achromatopsia (no color) | #4F4F4F | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6431A9
#6431A9
oklch(44.8% 0.181 298.1)
- #505C00
#505C00
oklch(44.9% 0.105 118.1)
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 #6431A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.027
- Grape #7209B7 ΔE 0.052
- Bluey Purple #6241C7 ΔE 0.057
- Chrysanthemum #560BAD ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Blurple #5539CC ΔE 0.065
- Blueberry #464196 ΔE 0.067
- Purple Blue #5D21D0 ΔE 0.067
Use #6431A9 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.