#6331A6
Closest named color: Rebecca Purple (#663399). oklch(44.4% 0.177 298.4), rgb(99, 49, 166).
Aa
White text reads best on this color (8.33:1).
About this color
#6331A6 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.177 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 0.023 away. White text reads best on it, at 8.33:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.177) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.52:1 |
| White text | 8.33:1 |
Values
| HEX | #6331A6 |
| RGB | rgb(99, 49, 166) |
| HSL | hsl(266, 54%, 42%) |
| OKLCH | oklch(44.4% 0.177 298.4) |
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 #6331A6 | 8.33:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #6331A6 | 2.52:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #6331A6 text on white | 8.33:1 | AAA | Lc 88.1 | Fine for body text |
| #6331A6 text on black | 2.52:1 | Fails | Lc -14.1 | 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
#DDD2FB
oklch(88.6% 0.057 297.5)
-
Step 300
300
#C9B2FB
oklch(80.9% 0.104 298.5)
-
Step 400
400
#AF86F9
oklch(70.7% 0.166 298.5)
-
Step 500
500
#9D62F6
oklch(63.2% 0.213 298.5)
-
Step 600
600
#8942E4
oklch(55.6% 0.23 298.6)
-
Step 700
700
#7431C6
oklch(49% 0.214 298.5)
-
Step 800
800 (this color)
#6331A6
oklch(44.4% 0.177 298.4)
-
Step 900
900
#4D297F
oklch(37.6% 0.138 298.8)
-
Step 950
950
#2D1A4B
oklch(27.2% 0.087 298.2)
#6331A6 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) | #004EA9 | 0.119 |
| Deuteranopia (no green cones) | #004DA4 | 0.119 |
| Tritanopia (no blue cones) | #534D68 | 0.133 |
| Achromatopsia (no color) | #4E4E4E | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6331A6
#6331A6
oklch(44.4% 0.177 298.4)
- #4F5B00
#4F5B00
oklch(44.5% 0.104 118.2)
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 #6331A6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.023
- Grape #7209B7 ΔE 0.055
- Chrysanthemum #560BAD ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Blueberry #464196 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.068
- Blurple #5539CC ΔE 0.069
Use #6331A6 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.