#634CB9
Closest named color: Iris (#6258C4). oklch(49.9% 0.165 288.7), rgb(99, 76, 185).
Aa
White text reads best on this color (6.43:1).
About this color
#634CB9 is a medium-dark, vivid purple. In OKLCH its lightness is 50%, its chroma 0.165 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.032 away. White text reads best on it, at 6.43:1.
| Hue family | Purples |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #634CB9 |
| RGB | rgb(99, 76, 185) |
| HSL | hsl(253, 44%, 51%) |
| OKLCH | oklch(49.9% 0.165 288.7) |
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 #634CB9 | 6.43:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #634CB9 | 3.26:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #634CB9 text on white | 6.43:1 | AA | Lc 81.6 | Fine for body text |
| #634CB9 text on black | 3.26:1 | AA large text | Lc -20.3 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F2
oklch(80.9% 0.08 288.5)
-
Step 400
400
#9E92EB
oklch(70.6% 0.128 288.9)
-
Step 500
500
#8875E4
oklch(63.1% 0.162 288.8)
-
Step 600
600
#735BD2
oklch(55.7% 0.176 288.6)
-
Step 700
700 (this color)
#634CB9
oklch(49.9% 0.165 288.7)
-
Step 800
800
#4F3D93
oklch(42.7% 0.136 289)
-
Step 900
900
#413576
oklch(37.7% 0.107 288.7)
-
Step 950
950
#262045
oklch(27.1% 0.067 288.6)
#634CB9 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) | #0061BD | 0.096 |
| Deuteranopia (no green cones) | #005CB7 | 0.095 |
| Tritanopia (no blue cones) | #48657B | 0.136 |
| Achromatopsia (no color) | #5F5F5F | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634CB9
#634CB9
oklch(49.9% 0.165 288.7)
- #696700
#696700
oklch(49.9% 0.108 108.4)
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 #634CB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.032
- Bluey Purple #6241C7 ΔE 0.033
- Slate Blue #6A5ACD ΔE 0.046
- Light Indigo #6D5ACF ΔE 0.049
- Blue With A Hint Of Purple #533CC6 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.056
- Blurple #5539CC ΔE 0.057
- Warm Blue #4B57DB ΔE 0.065
Use #634CB9 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.