#634AA3
Closest named color: Rebecca Purple (#663399). oklch(48% 0.138 293.5), rgb(99, 74, 163).
Aa
White text reads best on this color (6.91:1).
About this color
#634AA3 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.138 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.052 away. White text reads best on it, at 6.91:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #634AA3 |
| RGB | rgb(99, 74, 163) |
| HSL | hsl(257, 38%, 46%) |
| OKLCH | oklch(48% 0.138 293.5) |
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 #634AA3 | 6.91:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #634AA3 | 3.03:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #634AA3 text on white | 6.91:1 | AA | Lc 83.6 | Fine for body text |
| #634AA3 text on black | 3.03:1 | AA large text | Lc -18.3 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F0
oklch(88.5% 0.037 294.1)
-
Step 300
300
#C2B9E8
oklch(80.9% 0.066 293.6)
-
Step 400
400
#A494DD
oklch(70.8% 0.106 293.6)
-
Step 500
500
#8E77D4
oklch(63.1% 0.137 293.4)
-
Step 600
600
#795EC1
oklch(55.6% 0.149 293.5)
-
Step 700
700 (this color)
#634AA3
oklch(48% 0.138 293.5)
-
Step 800
800
#534087
oklch(42.8% 0.114 293.3)
-
Step 900
900
#44376C
oklch(37.7% 0.089 292.9)
-
Step 950
950
#28203F
oklch(26.9% 0.057 294.1)
#634AA3 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) | #225BA6 | 0.086 |
| Deuteranopia (no green cones) | #2858A1 | 0.081 |
| Tritanopia (no blue cones) | #535C6F | 0.111 |
| Achromatopsia (no color) | #5A5A5A | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634AA3
#634AA3
oklch(48% 0.138 293.5)
- #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 #634AA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.052
- Twilight #4E518B ΔE 0.056
- Iris #6258C4 ΔE 0.059
- Blueberry #464196 ΔE 0.059
- Bluey Purple #6241C7 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.069
- Blue With A Hint Of Purple #533CC6 ΔE 0.072
- Dusk #4E5481 ΔE 0.073
Use #634AA3 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.