#633379
Closest named color: Rebecca Purple (#663399). oklch(41.4% 0.122 314), rgb(99, 51, 121).
Aa
White text reads best on this color (9.20:1).
About this color
#633379 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.122 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 0.053 away. White text reads best on it, at 9.20:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.122) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #633379 |
| RGB | rgb(99, 51, 121) |
| HSL | hsl(281, 41%, 34%) |
| OKLCH | oklch(41.4% 0.122 314) |
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 #633379 | 9.20:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #633379 | 2.28:1 | Fails | Lc 13.1 | Not readable |
| #633379 text on white | 9.20:1 | AAA | Lc 90.9 | Preferred for body text |
| #633379 text on black | 2.28:1 | Fails | Lc -11.5 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EFE6F4
oklch(93.6% 0.021 313.8)
-
Step 200
200
#E3D2EC
oklch(88.5% 0.04 314.1)
-
Step 300
300
#D2B3E1
oklch(80.8% 0.072 314.7)
-
Step 400
400
#BA8BD2
oklch(70.7% 0.113 313.8)
-
Step 500
500
#A96CC6
oklch(63.1% 0.145 314.1)
-
Step 600
600
#9451B3
oklch(55.5% 0.159 314)
-
Step 700
700
#7E419A
oklch(49% 0.148 313.9)
-
Step 800
800 (this color)
#633379
oklch(41.4% 0.122 314)
-
Step 900
900
#543064
oklch(37.7% 0.095 314.6)
-
Step 950
950
#311D3B
oklch(27.1% 0.06 313.7)
#633379 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) | #20457B | 0.108 |
| Deuteranopia (no green cones) | #314977 | 0.096 |
| Tritanopia (no blue cones) | #613F51 | 0.082 |
| Achromatopsia (no color) | #484848 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633379
#633379
oklch(41.4% 0.122 314)
- #2E5800
#2E5800
oklch(41.3% 0.118 133.8)
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 #633379, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.060
- Blueberry #464196 ΔE 0.074
- Purple #800080 ΔE 0.081
- Twilight #4E518B ΔE 0.082
- Grape Purple #5D1451 ΔE 0.087
- Rich Purple #720058 ΔE 0.088
- Dusk #4E5481 ΔE 0.090
Use #633379 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.