#6631A3
Closest named color: Rebecca Purple (#663399). oklch(44.5% 0.174 300.7), rgb(102, 49, 163).
Aa
White text reads best on this color (8.29:1).
About this color
#6631A3 is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.174 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.017 away. White text reads best on it, at 8.29:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #6631A3 |
| RGB | rgb(102, 49, 163) |
| HSL | hsl(268, 54%, 42%) |
| OKLCH | oklch(44.5% 0.174 300.7) |
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 #6631A3 | 8.29:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #6631A3 | 2.53:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #6631A3 text on white | 8.29:1 | AAA | Lc 88.0 | Fine for body text |
| #6631A3 text on black | 2.53:1 | Fails | Lc -14.2 | 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
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6FB
oklch(93.7% 0.029 301)
-
Step 200
200
#DFD1FA
oklch(88.5% 0.058 300.8)
-
Step 300
300
#CBB2F9
oklch(81% 0.102 300.3)
-
Step 400
400
#B285F5
oklch(70.6% 0.163 300.8)
-
Step 500
500
#A061F1
oklch(63% 0.209 300.7)
-
Step 600
600
#8C41E0
oklch(55.5% 0.227 300.6)
-
Step 700
700
#7731C2
oklch(49% 0.211 300.6)
-
Step 800
800 (this color)
#6631A3
oklch(44.5% 0.174 300.7)
-
Step 900
900
#4F297D
oklch(37.7% 0.136 300.8)
-
Step 950
950
#2E1949
oklch(26.9% 0.086 300.9)
#6631A3 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) | #004EA6 | 0.124 |
| Deuteranopia (no green cones) | #004EA1 | 0.125 |
| Tritanopia (no blue cones) | #594C66 | 0.130 |
| Achromatopsia (no color) | #4E4E4E | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6631A3
#6631A3
oklch(44.5% 0.174 300.7)
- #4C5C00
#4C5C00
oklch(44.5% 0.106 120.7)
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 #6631A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.017
- Grape #7209B7 ΔE 0.055
- Chrysanthemum #560BAD ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.066
- Blueberry #464196 ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.070
- Blurple #5539CC ΔE 0.075
Use #6631A3 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.