#63407C
Closest named color: Twilight (#4E518B). oklch(43.8% 0.103 309.7), rgb(99, 64, 124).
Aa
White text reads best on this color (8.21:1).
About this color
#63407C is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.103 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.056 away. White text reads best on it, at 8.21:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.55:1 |
| White text | 8.21:1 |
Values
| HEX | #63407C |
| RGB | rgb(99, 64, 124) |
| HSL | hsl(275, 32%, 37%) |
| OKLCH | oklch(43.8% 0.103 309.7) |
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 #63407C | 8.21:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #63407C | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #63407C text on white | 8.21:1 | AAA | Lc 88.2 | Fine for body text |
| #63407C text on black | 2.55:1 | Fails | Lc -13.9 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CCB6DE
oklch(80.8% 0.06 309.7)
-
Step 400
400
#B390CE
oklch(70.8% 0.096 309.8)
-
Step 500
500
#A073C1
oklch(63.1% 0.123 309.8)
-
Step 600
600
#8B5AAD
oklch(55.6% 0.134 309.9)
-
Step 700
700
#764A95
oklch(49.2% 0.124 309.6)
-
Step 800
800 (this color)
#63407C
oklch(43.8% 0.103 309.7)
-
Step 900
900
#4E3461
oklch(37.6% 0.08 309.6)
-
Step 950
950
#2E1F39
oklch(27% 0.051 309.8)
#63407C 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) | #324D7E | 0.080 |
| Deuteranopia (no green cones) | #3B4F7A | 0.073 |
| Tritanopia (no blue cones) | #604A58 | 0.074 |
| Achromatopsia (no color) | #4F4F4F | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63407C
#63407C
oklch(43.8% 0.103 309.7)
- #3F5D16
#3F5D16
oklch(43.9% 0.103 129.9)
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 #63407C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.057
- Rebecca Purple #663399 ΔE 0.059
- Dusk #4E5481 ΔE 0.061
- Blueberry #464196 ΔE 0.066
- Dusty Grape #545775 ΔE 0.071
- Light Eggplant #894585 ΔE 0.076
- Brownish Purple #76424E ΔE 0.087
Use #63407C 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.