#63438D
Closest named color: Rebecca Purple (#663399). oklch(45.4% 0.12 301.8), rgb(99, 67, 141).
Aa
White text reads best on this color (7.72:1).
About this color
#63438D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.120 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 0.043 away. White text reads best on it, at 7.72:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #63438D |
| RGB | rgb(99, 67, 141) |
| HSL | hsl(266, 36%, 41%) |
| OKLCH | oklch(45.4% 0.12 301.8) |
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 #63438D | 7.72:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #63438D | 2.71:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #63438D text on white | 7.72:1 | AAA | Lc 86.6 | Fine for body text |
| #63438D text on black | 2.71:1 | Fails | Lc -15.5 | 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
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DDD4EF
oklch(88.5% 0.038 300.8)
-
Step 300
300
#C8B6E7
oklch(80.8% 0.071 301.6)
-
Step 400
400
#AD8FDB
oklch(70.6% 0.113 301.7)
-
Step 500
500
#9A72D1
oklch(63.1% 0.143 301.9)
-
Step 600
600
#8558BE
oklch(55.6% 0.156 301.9)
-
Step 700
700
#7148A4
oklch(49.2% 0.145 301.9)
-
Step 800
800 (this color)
#63438D
oklch(45.4% 0.12 301.8)
-
Step 900
900
#4B346A
oklch(37.8% 0.092 301.8)
-
Step 950
950
#2C1F3E
oklch(27.1% 0.058 302)
#63438D 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) | #2A5290 | 0.086 |
| Deuteranopia (no green cones) | #33528B | 0.079 |
| Tritanopia (no blue cones) | #5B5161 | 0.092 |
| Achromatopsia (no color) | #535353 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63438D
#63438D
oklch(45.4% 0.12 301.8)
- #4D5F00
#4D5F00
oklch(45.4% 0.11 121.6)
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 #63438D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.043
- Twilight #4E518B ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.053
- Dusk #4E5481 ΔE 0.061
- Light Eggplant #894585 ΔE 0.074
- Dusty Grape #545775 ΔE 0.078
- Dusky Blue #475F94 ΔE 0.081
Use #63438D 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.