#63387D
Closest named color: Rebecca Purple (#663399). oklch(42.5% 0.118 311.1), rgb(99, 56, 125).
Aa
White text reads best on this color (8.77:1).
About this color
#63387D is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.118 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.049 away. White text reads best on it, at 8.77:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #63387D |
| RGB | rgb(99, 56, 125) |
| HSL | hsl(277, 38%, 35%) |
| OKLCH | oklch(42.5% 0.118 311.1) |
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 #63387D | 8.77:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #63387D | 2.39:1 | Fails | Lc 14.2 | Not readable |
| #63387D text on white | 8.77:1 | AAA | Lc 89.7 | Fine for body text |
| #63387D text on black | 2.39:1 | Fails | Lc -12.5 | 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
#EEE6F4
oklch(93.5% 0.021 311.1)
-
Step 200
200
#E1D2EC
oklch(88.4% 0.039 311.1)
-
Step 300
300
#CFB5E2
oklch(81% 0.068 310.8)
-
Step 400
400
#B78CD3
oklch(70.6% 0.111 311.4)
-
Step 500
500
#A56EC7
oklch(63.1% 0.141 311.4)
-
Step 600
600
#9054B4
oklch(55.6% 0.154 311.2)
-
Step 700
700
#7A449B
oklch(49% 0.143 310.9)
-
Step 800
800 (this color)
#63387D
oklch(42.5% 0.118 311.1)
-
Step 900
900
#513165
oklch(37.6% 0.093 311.1)
-
Step 950
950
#301D3B
oklch(27% 0.059 312.1)
#63387D 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) | #25497F | 0.100 |
| Deuteranopia (no green cones) | #334B7B | 0.088 |
| Tritanopia (no blue cones) | #604455 | 0.082 |
| Achromatopsia (no color) | #4B4B4B | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63387D
#63387D
oklch(42.5% 0.118 311.1)
- #365A00
#365A00
oklch(42.4% 0.116 131.2)
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 #63387D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.054
- Blueberry #464196 ΔE 0.066
- Twilight #4E518B ΔE 0.071
- Dusk #4E5481 ΔE 0.079
- Light Eggplant #894585 ΔE 0.084
- Purple #800080 ΔE 0.088
- Dusty Grape #545775 ΔE 0.091
Use #63387D 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.