#635ECD
Closest named color: Dark Periwinkle (#665FD1). oklch(54.5% 0.167 281.4), rgb(99, 94, 205).
Aa
White text reads best on this color (5.23:1).
About this color
#635ECD is a medium-dark, vivid purple. In OKLCH its lightness is 55%, its chroma 0.167 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.008 away. White text reads best on it, at 5.23:1.
| Hue family | Purples |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.01:1 |
| White text | 5.23:1 |
Values
| HEX | #635ECD |
| RGB | rgb(99, 94, 205) |
| HSL | hsl(243, 53%, 59%) |
| OKLCH | oklch(54.5% 0.167 281.4) |
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 #635ECD | 5.23:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #635ECD | 4.01:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #635ECD text on white | 5.23:1 | AA | Lc 75.7 | Fine for body text |
| #635ECD text on black | 4.01:1 | AA large text | Lc -26.0 | 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 600.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D4D7F5
oklch(88.6% 0.041 281)
-
Step 300
300
#B8BCF1
oklch(81% 0.075 281.2)
-
Step 400
400
#9497EA
oklch(70.7% 0.121 281.3)
-
Step 500
500
#7B7BE3
oklch(63.1% 0.153 281.1)
-
Step 600
600 (this color)
#635ECD
oklch(54.5% 0.167 281.4)
-
Step 700
700
#5550B5
oklch(49.1% 0.155 281.3)
-
Step 800
800
#454292
oklch(42.7% 0.128 281.2)
-
Step 900
900
#3A3975
oklch(37.8% 0.1 281.2)
-
Step 950
950
#222244
oklch(27.1% 0.062 281.4)
#635ECD 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) | #1C70D1 | 0.075 |
| Deuteranopia (no green cones) | #0A68CB | 0.078 |
| Tritanopia (no blue cones) | #38778C | 0.144 |
| Achromatopsia (no color) | #6C6C6C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #635ECD
#635ECD
oklch(54.5% 0.167 281.4)
- #7E7100
#7E7100
oklch(54.4% 0.114 101.4)
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 #635ECD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.008
- Slate Blue #6A5ACD ΔE 0.013
- Light Indigo #6D5ACF ΔE 0.017
- Iris #6258C4 ΔE 0.019
- Warm Blue #4B57DB ΔE 0.045
- Royal Blue #4169E1 ΔE 0.053
- Neon Blue #4361EE ΔE 0.063
- Bluey Purple #6241C7 ΔE 0.065
Use #635ECD 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.