#613781
Closest named color: Rebecca Purple (#663399). oklch(42.3% 0.124 308.2), rgb(97, 55, 129).
Aa
White text reads best on this color (8.85:1).
About this color
#613781 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.124 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.042 away. White text reads best on it, at 8.85:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.124) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #613781 |
| RGB | rgb(97, 55, 129) |
| HSL | hsl(274, 40%, 36%) |
| OKLCH | oklch(42.3% 0.124 308.2) |
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 #613781 | 8.85:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #613781 | 2.37:1 | Fails | Lc 14.0 | Not readable |
| #613781 text on white | 8.85:1 | AAA | Lc 89.9 | Fine for body text |
| #613781 text on black | 2.37:1 | Fails | Lc -12.3 | 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
#E0D3EE
oklch(88.6% 0.039 307.2)
-
Step 300
300
#CEB5E5
oklch(81% 0.072 308.4)
-
Step 400
400
#B58CD8
oklch(70.7% 0.116 308.4)
-
Step 500
500
#A36ECD
oklch(63.2% 0.147 308.5)
-
Step 600
600
#8E54BA
oklch(55.7% 0.16 308.3)
-
Step 700
700
#7943A1
oklch(49.1% 0.151 308.3)
-
Step 800
800 (this color)
#613781
oklch(42.3% 0.124 308.2)
-
Step 900
900
#503168
oklch(37.7% 0.096 308.5)
-
Step 950
950
#2F1D3D
oklch(27% 0.062 308.8)
#613781 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) | #1F4883 | 0.102 |
| Deuteranopia (no green cones) | #2D4B7F | 0.092 |
| Tritanopia (no blue cones) | #5C4456 | 0.088 |
| Achromatopsia (no color) | #4A4A4A | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613781
#613781
oklch(42.3% 0.124 308.2)
- #3C5900
#3C5900
oklch(42.5% 0.111 128.2)
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 #613781, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.049
- Blueberry #464196 ΔE 0.060
- Twilight #4E518B ΔE 0.071
- Dusk #4E5481 ΔE 0.081
- Purple #800080 ΔE 0.088
- Light Eggplant #894585 ΔE 0.088
- Dusty Grape #545775 ΔE 0.095
Use #613781 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.