#63438C
Closest named color: Rebecca Purple (#663399). oklch(45.3% 0.118 302.1), rgb(99, 67, 140).
Aa
White text reads best on this color (7.74:1).
About this color
#63438C is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.118 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.044 away. White text reads best on it, at 7.74:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.71:1 |
| White text | 7.74:1 |
Values
| HEX | #63438C |
| RGB | rgb(99, 67, 140) |
| HSL | hsl(266, 35%, 41%) |
| OKLCH | oklch(45.3% 0.118 302.1) |
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 #63438C | 7.74:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #63438C | 2.71:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #63438C text on white | 7.74:1 | AAA | Lc 86.7 | Fine for body text |
| #63438C text on black | 2.71:1 | Fails | Lc -15.4 | 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 800.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DED4EF
oklch(88.6% 0.038 302.4)
-
Step 300
300
#C9B7E6
oklch(81% 0.068 302.4)
-
Step 400
400
#AE90DA
oklch(70.8% 0.11 302.3)
-
Step 500
500
#9A72D0
oklch(63.1% 0.142 302.1)
-
Step 600
600
#8559BD
oklch(55.7% 0.153 302)
-
Step 700
700
#7148A3
oklch(49.1% 0.143 302.2)
-
Step 800
800 (this color)
#63438C
oklch(45.3% 0.118 302.1)
-
Step 900
900
#4B346A
oklch(37.8% 0.092 301.8)
-
Step 950
950
#2C1F3E
oklch(27.1% 0.058 302)
#63438C 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) | #2B528F | 0.085 |
| Deuteranopia (no green cones) | #34528A | 0.078 |
| Tritanopia (no blue cones) | #5B5061 | 0.089 |
| Achromatopsia (no color) | #535353 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63438C
#63438C
oklch(45.3% 0.118 302.1)
- #4C5F00
#4C5F00
oklch(45.3% 0.11 122.2)
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 #63438C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.044
- Twilight #4E518B ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.054
- Dusk #4E5481 ΔE 0.061
- Light Eggplant #894585 ΔE 0.074
- Dusty Grape #545775 ΔE 0.077
- Dusky Blue #475F94 ΔE 0.081
Use #63438C 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.