#634EC6
Closest named color: Iris (#6258C4). oklch(51.2% 0.179 286.3), rgb(99, 78, 198).
Aa
White text reads best on this color (6.11:1).
About this color
#634EC6 is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.179 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.023 away. White text reads best on it, at 6.11:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #634EC6 |
| RGB | rgb(99, 78, 198) |
| HSL | hsl(251, 51%, 54%) |
| OKLCH | oklch(51.2% 0.179 286.3) |
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 #634EC6 | 6.11:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #634EC6 | 3.43:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #634EC6 text on white | 6.11:1 | AA | Lc 80.1 | Fine for body text |
| #634EC6 text on black | 3.43:1 | AA large text | Lc -21.7 | 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
#F4F4FD
oklch(97% 0.012 286.2)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BBB9F7
oklch(80.9% 0.087 285.8)
-
Step 400
400
#9A92F2
oklch(70.7% 0.138 286.1)
-
Step 500
500
#8474EE
oklch(63.2% 0.177 286.2)
-
Step 600
600
#6F58DC
oklch(55.5% 0.193 286.3)
-
Step 700
700 (this color)
#634EC6
oklch(51.2% 0.179 286.3)
-
Step 800
800
#4C3C9A
oklch(42.8% 0.147 286.2)
-
Step 900
900
#3F347B
oklch(37.7% 0.116 286.5)
-
Step 950
950
#241F48
oklch(26.9% 0.074 285.9)
#634EC6 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) | #0065CA | 0.093 |
| Deuteranopia (no green cones) | #005EC4 | 0.091 |
| Tritanopia (no blue cones) | #3F6A82 | 0.149 |
| Achromatopsia (no color) | #626262 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #634EC6
#634EC6
oklch(51.2% 0.179 286.3)
- #6F6A00
#6F6A00
oklch(51.2% 0.11 106.4)
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 #634EC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.023
- Bluey Purple #6241C7 ΔE 0.028
- Slate Blue #6A5ACD ΔE 0.032
- Light Indigo #6D5ACF ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.043
- Blue With A Hint Of Purple #533CC6 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.049
- Blurple #5539CC ΔE 0.052
Use #634EC6 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.