#663CBF
Closest named color: Bluey Purple (#6241C7). oklch(48.2% 0.193 292.3), rgb(102, 60, 191).
Aa
White text reads best on this color (7.08:1).
About this color
#663CBF is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.193 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.017 away. White text reads best on it, at 7.08:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.193) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #663CBF |
| RGB | rgb(102, 60, 191) |
| HSL | hsl(259, 52%, 49%) |
| OKLCH | oklch(48.2% 0.193 292.3) |
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 #663CBF | 7.08:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #663CBF | 2.96:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #663CBF text on white | 7.08:1 | AAA | Lc 83.9 | Fine for body text |
| #663CBF text on black | 2.96:1 | Fails | Lc -18.0 | 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
#D9D4F9
oklch(88.6% 0.051 291.5)
-
Step 300
300
#C2B6F8
oklch(80.9% 0.093 292.5)
-
Step 400
400
#A48DF5
oklch(70.7% 0.149 292.3)
-
Step 500
500
#906CF1
oklch(63.1% 0.192 292.5)
-
Step 600
600
#7B4FDF
oklch(55.5% 0.208 292.3)
-
Step 700
700 (this color)
#663CBF
oklch(48.2% 0.193 292.3)
-
Step 800
800
#55359D
oklch(42.7% 0.16 292.4)
-
Step 900
900
#45307D
oklch(37.7% 0.125 291.9)
-
Step 950
950
#281D49
oklch(27% 0.079 291.8)
#663CBF 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) | #005AC3 | 0.111 |
| Deuteranopia (no green cones) | #0056BC | 0.110 |
| Tritanopia (no blue cones) | #4B5D79 | 0.153 |
| Achromatopsia (no color) | #585858 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663CBF
#663CBF
oklch(48.2% 0.193 292.3)
- #606400
#606400
oklch(48.3% 0.107 112.5)
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 #663CBF, closest first.
No curated palette has a color within ΔE 0.04 of #663CBF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.017
- Blue With A Hint Of Purple #533CC6 ΔE 0.036
- Blurple #5539CC ΔE 0.038
- Purple Blue #5D21D0 ΔE 0.052
- Burple #6832E3 ΔE 0.057
- Iris #6258C4 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.063
- Purpley Blue #5F34E7 ΔE 0.065
Use #663CBF 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.