#663EAF
Closest named color: Bluey Purple (#6241C7). oklch(47.3% 0.171 295.3), rgb(102, 62, 175).
Aa
White text reads best on this color (7.30:1).
About this color
#663EAF is a medium-dark, vivid purple. In OKLCH its lightness is 47%, its chroma 0.171 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Bluey Purple (#6241C7), ΔE 0.039 away. White text reads best on it, at 7.30:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.171) |
| Temperature | in between |
| Nearest name | Bluey Purple (#6241C7) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #663EAF |
| RGB | rgb(102, 62, 175) |
| HSL | hsl(261, 48%, 46%) |
| OKLCH | oklch(47.3% 0.171 295.3) |
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 #663EAF | 7.30:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #663EAF | 2.87:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #663EAF text on white | 7.30:1 | AAA | Lc 84.9 | Fine for body text |
| #663EAF text on black | 2.87:1 | Fails | Lc -17.1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DBD4F5
oklch(88.6% 0.046 295.2)
-
Step 300
300
#C4B6F1
oklch(80.8% 0.083 295.4)
-
Step 400
400
#A78EEA
oklch(70.6% 0.133 295.3)
-
Step 500
500
#936FE3
oklch(63% 0.17 295.4)
-
Step 600
600
#7F54D1
oklch(55.6% 0.185 295.6)
-
Step 700
700 (this color)
#663EAF
oklch(47.3% 0.171 295.3)
-
Step 800
800
#573993
oklch(42.8% 0.142 295.1)
-
Step 900
900
#473275
oklch(37.7% 0.111 295)
-
Step 950
950
#2A1E44
oklch(27% 0.069 296)
#663EAF 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) | #0057B3 | 0.112 |
| Deuteranopia (no green cones) | #0055AD | 0.112 |
| Tritanopia (no blue cones) | #535871 | 0.133 |
| Achromatopsia (no color) | #565656 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #663EAF
#663EAF
oklch(47.3% 0.171 295.3)
- #5A6200
#5A6200
oklch(47.3% 0.107 115.2)
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 #663EAF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluey Purple #6241C7 ΔE 0.039
- Rebecca Purple #663399 ΔE 0.041
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Blurple #5539CC ΔE 0.057
- Iris #6258C4 ΔE 0.065
- Blueberry #464196 ΔE 0.068
- Grape #7209B7 ΔE 0.069
- Purple Blue #5D21D0 ΔE 0.071
Use #663EAF 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.