#63337F
Closest named color: Rebecca Purple (#663399). oklch(41.8% 0.129 311.2), rgb(99, 51, 127).
Aa
White text reads best on this color (9.08:1).
About this color
#63337F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.129 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 0.043 away. White text reads best on it, at 9.08:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #63337F |
| RGB | rgb(99, 51, 127) |
| HSL | hsl(278, 43%, 35%) |
| OKLCH | oklch(41.8% 0.129 311.2) |
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 #63337F | 9.08:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #63337F | 2.31:1 | Fails | Lc 13.5 | Not readable |
| #63337F text on white | 9.08:1 | AAA | Lc 90.5 | Preferred for body text |
| #63337F text on black | 2.31:1 | Fails | Lc -11.8 | 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
#F8F4FB
oklch(97.2% 0.01 311.2)
-
Step 100
100
#EFE6F5
oklch(93.6% 0.022 312.2)
-
Step 200
200
#E2D2EE
oklch(88.5% 0.042 310.9)
-
Step 300
300
#D0B3E5
oklch(80.8% 0.076 310.8)
-
Step 400
400
#B98AD8
oklch(70.7% 0.121 311.2)
-
Step 500
500
#A76BCD
oklch(63.1% 0.154 311)
-
Step 600
600
#9350BA
oklch(55.7% 0.168 311.3)
-
Step 700
700
#7D40A0
oklch(49.1% 0.156 311.3)
-
Step 800
800 (this color)
#63337F
oklch(41.8% 0.129 311.2)
-
Step 900
900
#532F68
oklch(37.7% 0.101 311.6)
-
Step 950
950
#301C3D
oklch(26.9% 0.064 310.7)
#63337F 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) | #1A4681 | 0.112 |
| Deuteranopia (no green cones) | #2D497D | 0.099 |
| Tritanopia (no blue cones) | #604154 | 0.089 |
| Achromatopsia (no color) | #484848 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63337F
#63337F
oklch(41.8% 0.129 311.2)
- #355800
#355800
oklch(41.7% 0.114 131.1)
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 #63337F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.056
- Blueberry #464196 ΔE 0.068
- Purple #800080 ΔE 0.080
- Twilight #4E518B ΔE 0.081
- Dusk #4E5481 ΔE 0.090
- Light Eggplant #894585 ΔE 0.090
- Rich Purple #720058 ΔE 0.094
Use #63337F 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.