#613381
Closest named color: Rebecca Purple (#663399). oklch(41.7% 0.131 309), rgb(97, 51, 129).
Aa
White text reads best on this color (9.13:1).
About this color
#613381 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.131 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.040 away. White text reads best on it, at 9.13:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #613381 |
| RGB | rgb(97, 51, 129) |
| HSL | hsl(275, 43%, 35%) |
| OKLCH | oklch(41.7% 0.131 309) |
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 #613381 | 9.13:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #613381 | 2.29:1 | Fails | Lc 13.3 | Not readable |
| #613381 text on white | 9.13:1 | AAA | Lc 90.6 | Preferred for body text |
| #613381 text on black | 2.29:1 | Fails | Lc -11.7 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E1D2EF
oklch(88.5% 0.042 308.6)
-
Step 300
300
#CFB4E7
oklch(81% 0.076 308.7)
-
Step 400
400
#B78BDA
oklch(70.8% 0.121 309.1)
-
Step 500
500
#A56BD0
oklch(63.1% 0.156 309.1)
-
Step 600
600
#9051BD
oklch(55.6% 0.169 308.8)
-
Step 700
700
#7B40A3
oklch(49.1% 0.159 309.2)
-
Step 800
800 (this color)
#613381
oklch(41.7% 0.131 309)
-
Step 900
900
#51306A
oklch(37.7% 0.101 308.6)
-
Step 950
950
#301C3E
oklch(27% 0.066 309.8)
#613381 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) | #164684 | 0.111 |
| Deuteranopia (no green cones) | #29497F | 0.099 |
| Tritanopia (no blue cones) | #5D4255 | 0.092 |
| Achromatopsia (no color) | #484848 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613381
#613381
oklch(41.7% 0.131 309)
- #395700
#395700
oklch(41.7% 0.111 129)
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 #613381, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.064
- Twilight #4E518B ΔE 0.079
- Purple #800080 ΔE 0.083
- Dusk #4E5481 ΔE 0.090
- Light Eggplant #894585 ΔE 0.094
- Indigo #4B0082 ΔE 0.094
Use #613381 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.