#6331A9
Closest named color: Rebecca Purple (#663399). oklch(44.7% 0.181 297.6), rgb(99, 49, 169).
Aa
White text reads best on this color (8.25:1).
About this color
#6331A9 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 8.25:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.181) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #6331A9 |
| RGB | rgb(99, 49, 169) |
| HSL | hsl(265, 55%, 43%) |
| OKLCH | oklch(44.7% 0.181 297.6) |
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 #6331A9 | 8.25:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #6331A9 | 2.54:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #6331A9 text on white | 8.25:1 | AAA | Lc 87.8 | Fine for body text |
| #6331A9 text on black | 2.54:1 | Fails | Lc -14.3 | 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
#DDD2FC
oklch(88.6% 0.058 297.2)
-
Step 300
300
#C8B2FD
oklch(80.9% 0.106 297.4)
-
Step 400
400
#AE86FB
oklch(70.7% 0.169 297.7)
-
Step 500
500
#9C61F8
oklch(63.1% 0.216 297.9)
-
Step 600
600
#8841E7
oklch(55.7% 0.234 297.7)
-
Step 700
700
#7330C9
oklch(49% 0.218 297.5)
-
Step 800
800 (this color)
#6331A9
oklch(44.7% 0.181 297.6)
-
Step 900
900
#4C2981
oklch(37.7% 0.141 297.5)
-
Step 950
950
#2C194C
oklch(26.9% 0.09 297.1)
#6331A9 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 | 0.118 |
| Deuteranopia (no green cones) | #004DA7 | 0.118 |
| Tritanopia (no blue cones) | #524F69 | 0.139 |
| Achromatopsia (no color) | #4E4E4E | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6331A9
#6331A9
oklch(44.7% 0.181 297.6)
- #505B00
#505B00
oklch(44.6% 0.103 117.6)
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 #6331A9, 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 0.053
- Chrysanthemum #560BAD ΔE 0.057
- Bluey Purple #6241C7 ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Blurple #5539CC ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Purple Blue #5D21D0 ΔE 0.067
Use #6331A9 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.