#63437D
Closest named color: Twilight (#4E518B). oklch(44.4% 0.098 308.3), rgb(99, 67, 125).
Aa
White text reads best on this color (7.98:1).
About this color
#63437D is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.098 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.050 away. White text reads best on it, at 7.98:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.62:1 |
| White text | 7.98:1 |
Values
| HEX | #63437D |
| RGB | rgb(99, 67, 125) |
| HSL | hsl(273, 30%, 38%) |
| OKLCH | oklch(44.4% 0.098 308.3) |
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 #63437D | 7.98:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #63437D | 2.62:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #63437D text on white | 7.98:1 | AAA | Lc 87.5 | Fine for body text |
| #63437D text on black | 2.62:1 | Fails | Lc -14.6 | Not readable |
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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EA
oklch(88.5% 0.032 308.1)
-
Step 300
300
#CBB7DE
oklch(80.9% 0.058 308.2)
-
Step 400
400
#B191CD
oklch(70.7% 0.092 308.5)
-
Step 500
500
#9E75C0
oklch(63.2% 0.118 308.5)
-
Step 600
600
#885CAC
oklch(55.5% 0.128 308.1)
-
Step 700
700
#744B94
oklch(49.1% 0.12 308.5)
-
Step 800
800 (this color)
#63437D
oklch(44.4% 0.098 308.3)
-
Step 900
900
#4D3561
oklch(37.6% 0.078 308.2)
-
Step 950
950
#2D2039
oklch(27.1% 0.048 307.3)
#63437D 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) | #354F7F | 0.075 |
| Deuteranopia (no green cones) | #3D517B | 0.069 |
| Tritanopia (no blue cones) | #5F4C5A | 0.071 |
| Achromatopsia (no color) | #515151 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63437D
#63437D
oklch(44.4% 0.098 308.3)
- #435E1A
#435E1A
oklch(44.5% 0.099 128.6)
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 #63437D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.058
- Rebecca Purple #663399 ΔE 0.063
- Dusty Grape #545775 ΔE 0.064
- Blueberry #464196 ΔE 0.066
- Light Eggplant #894585 ΔE 0.073
- YInMn Blue #415A77 ΔE 0.083
Use #63437D 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.