#634C87
Closest named color: Twilight (#4E518B). oklch(46.7% 0.096 300.7), rgb(99, 76, 135).
Aa
White text reads best on this color (7.20:1).
About this color
#634C87 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 47%, its chroma 0.096 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 7.20:1.
| Hue family | Purples |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.096) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #634C87 |
| RGB | rgb(99, 76, 135) |
| HSL | hsl(263, 28%, 41%) |
| OKLCH | oklch(46.7% 0.096 300.7) |
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 #634C87 | 7.20:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #634C87 | 2.91:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #634C87 text on white | 7.20:1 | AAA | Lc 84.9 | Fine for body text |
| #634C87 text on black | 2.91:1 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#EBE8F2
oklch(93.6% 0.014 299.8)
-
Step 200
200
#DCD6E8
oklch(88.6% 0.025 301)
-
Step 300
300
#C5BADB
oklch(80.9% 0.047 300.5)
-
Step 400
400
#A896C8
oklch(70.6% 0.074 301)
-
Step 500
500
#937CBA
oklch(63.1% 0.094 300.8)
-
Step 600
600
#7D64A6
oklch(55.5% 0.103 300.5)
-
Step 700
700 (this color)
#634C87
oklch(46.7% 0.096 300.7)
-
Step 800
800
#564474
oklch(42.7% 0.08 300.3)
-
Step 900
900
#473A5D
oklch(37.8% 0.06 300.6)
-
Step 950
950
#2A2237
oklch(27.1% 0.04 301.3)
#634C87 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) | #3C5789 | 0.062 |
| Deuteranopia (no green cones) | #415785 | 0.058 |
| Tritanopia (no blue cones) | #5C5663 | 0.074 |
| Achromatopsia (no color) | #575757 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634C87
#634C87
oklch(46.7% 0.096 300.7)
- #52621B
#52621B
oklch(46.8% 0.097 121.3)
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 #634C87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusk #4E5481 ΔE 0.041
- Dusty Grape #545775 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.066
- Blueberry #464196 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
- Muted Purple #805B87 ΔE 0.069
Use #634C87 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.