#633778
Closest named color: Rebecca Purple (#663399). oklch(42% 0.114 313.8), rgb(99, 55, 120).
Aa
White text reads best on this color (8.94:1).
About this color
#633778 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.114 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.056 away. White text reads best on it, at 8.94:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.114) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #633778 |
| RGB | rgb(99, 55, 120) |
| HSL | hsl(281, 37%, 34%) |
| OKLCH | oklch(42% 0.114 313.8) |
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 #633778 | 8.94:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #633778 | 2.34:1 | Fails | Lc 13.8 | Not readable |
| #633778 text on white | 8.94:1 | AAA | Lc 90.2 | Preferred for body text |
| #633778 text on black | 2.34:1 | Fails | Lc -12.1 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F3
oklch(93.6% 0.02 315.7)
-
Step 200
200
#E2D2EB
oklch(88.4% 0.038 313.6)
-
Step 300
300
#D0B4DF
oklch(80.8% 0.067 313.8)
-
Step 400
400
#B98CCF
oklch(70.7% 0.107 314.3)
-
Step 500
500
#A76EC3
oklch(63.1% 0.137 313.8)
-
Step 600
600
#9255AF
oklch(55.7% 0.147 313.8)
-
Step 700
700
#7C4596
oklch(49.1% 0.136 313.8)
-
Step 800
800 (this color)
#633778
oklch(42% 0.114 313.8)
-
Step 900
900
#523262
oklch(37.7% 0.087 313.6)
-
Step 950
950
#301D3A
oklch(26.9% 0.058 313.2)
#633778 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) | #27477A | 0.099 |
| Deuteranopia (no green cones) | #354B76 | 0.089 |
| Tritanopia (no blue cones) | #614152 | 0.076 |
| Achromatopsia (no color) | #494949 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633778
#633778
oklch(42% 0.114 313.8)
- #315A0A
#315A0A
oklch(42.1% 0.114 134)
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 #633778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.058
- Blueberry #464196 ΔE 0.072
- Twilight #4E518B ΔE 0.075
- Dusk #4E5481 ΔE 0.081
- Light Eggplant #894585 ΔE 0.086
- Purple #800080 ΔE 0.088
- Dusty Grape #545775 ΔE 0.091
Use #633778 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.