#613F71
Closest named color: Dusk (#4E5481). oklch(42.8% 0.089 314.3), rgb(97, 63, 113).
Aa
White text reads best on this color (8.54:1).
About this color
#613F71 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.089 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.063 away. White text reads best on it, at 8.54:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #613F71 |
| RGB | rgb(97, 63, 113) |
| HSL | hsl(281, 28%, 35%) |
| OKLCH | oklch(42.8% 0.089 314.3) |
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 #613F71 | 8.54:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #613F71 | 2.45:1 | Fails | Lc 14.8 | Not readable |
| #613F71 text on white | 8.54:1 | AAA | Lc 89.2 | Fine for body text |
| #613F71 text on black | 2.45:1 | Fails | Lc -13.0 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EEE7F1
oklch(93.6% 0.015 316)
-
Step 200
200
#E0D4E7
oklch(88.5% 0.029 313.3)
-
Step 300
300
#CDB7D9
oklch(80.9% 0.053 313.7)
-
Step 400
400
#B491C5
oklch(70.7% 0.084 314.5)
-
Step 500
500
#A175B6
oklch(63% 0.107 314.4)
-
Step 600
600
#8C5DA2
oklch(55.6% 0.116 314.4)
-
Step 700
700
#774C8B
oklch(49.1% 0.108 314.4)
-
Step 800
800 (this color)
#613F71
oklch(42.8% 0.089 314.3)
-
Step 900
900
#4F365B
oklch(37.7% 0.069 314.3)
-
Step 950
950
#2E2035
oklch(27% 0.043 314)
#613F71 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) | #364A73 | 0.073 |
| Deuteranopia (no green cones) | #3F4D70 | 0.066 |
| Tritanopia (no blue cones) | #604652 | 0.061 |
| Achromatopsia (no color) | #4C4C4C | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613F71
#613F71
oklch(42.8% 0.089 314.3)
- #3A5A24
#3A5A24
oklch(42.9% 0.089 134.3)
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 #613F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.063
- Twilight #4E518B ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.064
- Dusty Grape #545775 ΔE 0.068
- Brownish Purple #76424E ΔE 0.074
- Rebecca Purple #663399 ΔE 0.076
- Blueberry #464196 ΔE 0.077
- Purple Brown #673A3F ΔE 0.082
Use #613F71 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.