#663BBB
Closest named color: Bluey Purple (#6241C7). oklch(47.8% 0.19 293.3), rgb(102, 59, 187).
Aa
White text reads best on this color (7.22:1).
About this color
#663BBB is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.190 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.023 away. White text reads best on it, at 7.22:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.190) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.90:1 |
| White text | 7.22:1 |
Values
| HEX | #663BBB |
| RGB | rgb(102, 59, 187) |
| HSL | hsl(260, 52%, 48%) |
| OKLCH | oklch(47.8% 0.19 293.3) |
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 #663BBB | 7.22:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #663BBB | 2.90:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #663BBB text on white | 7.22:1 | AAA | Lc 84.4 | Fine for body text |
| #663BBB text on black | 2.90:1 | Fails | Lc -17.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7FB
oklch(93.6% 0.027 292.8)
-
Step 200
200
#DAD3F9
oklch(88.4% 0.052 293.7)
-
Step 300
300
#C3B6F7
oklch(81% 0.092 293.4)
-
Step 400
400
#A58DF3
oklch(70.7% 0.147 293.1)
-
Step 500
500
#916CEE
oklch(63% 0.188 293.4)
-
Step 600
600
#7D50DD
oklch(55.7% 0.204 293.3)
-
Step 700
700 (this color)
#663BBB
oklch(47.8% 0.19 293.3)
-
Step 800
800
#56359B
oklch(42.7% 0.158 293.5)
-
Step 900
900
#46307B
oklch(37.7% 0.122 293.2)
-
Step 950
950
#291D48
oklch(27% 0.077 293.4)
#663BBB 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) | #0059BF | 0.113 |
| Deuteranopia (no green cones) | #0055B8 | 0.112 |
| Tritanopia (no blue cones) | #4D5B76 | 0.151 |
| Achromatopsia (no color) | #575757 | 0.191 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663BBB
#663BBB
oklch(47.8% 0.19 293.3)
- #5E6300
#5E6300
oklch(47.9% 0.107 113.2)
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 #663BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.023
- Blue With A Hint Of Purple #533CC6 ΔE 0.038
- Blurple #5539CC ΔE 0.042
- Purple Blue #5D21D0 ΔE 0.054
- Rebecca Purple #663399 ΔE 0.057
- Grape #7209B7 ΔE 0.063
- Burple #6832E3 ΔE 0.063
- Iris #6258C4 ΔE 0.064
Use #663BBB 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.