#613D79
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.103 310.4), rgb(97, 61, 121).
Aa
White text reads best on this color (8.56:1).
About this color
#613D79 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.103 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 8.56:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #613D79 |
| RGB | rgb(97, 61, 121) |
| HSL | hsl(276, 33%, 36%) |
| OKLCH | oklch(42.9% 0.103 310.4) |
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 #613D79 | 8.56:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #613D79 | 2.45:1 | Fails | Lc 14.7 | Not readable |
| #613D79 text on white | 8.56:1 | AAA | Lc 89.2 | Fine for body text |
| #613D79 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CDB6DE
oklch(80.9% 0.061 310.8)
-
Step 400
400
#B390CE
oklch(70.8% 0.096 309.8)
-
Step 500
500
#A173C1
oklch(63.2% 0.123 310.4)
-
Step 600
600
#8C5AAD
oklch(55.7% 0.134 310.5)
-
Step 700
700
#774995
oklch(49.1% 0.126 310.5)
-
Step 800
800 (this color)
#613D79
oklch(42.9% 0.103 310.4)
-
Step 900
900
#4F3461
oklch(37.7% 0.081 310.7)
-
Step 950
950
#2E1F39
oklch(27% 0.051 309.8)
#613D79 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) | #2F4A7B | 0.082 |
| Deuteranopia (no green cones) | #394D77 | 0.075 |
| Tritanopia (no blue cones) | #5E4755 | 0.074 |
| Achromatopsia (no color) | #4C4C4C | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613D79
#613D79
oklch(42.9% 0.103 310.4)
- #3B5A13
#3B5A13
oklch(42.8% 0.103 130.6)
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 #613D79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Rebecca Purple #663399 ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Dusk #4E5481 ΔE 0.066
- Blueberry #464196 ΔE 0.067
- Dusty Grape #545775 ΔE 0.076
- Light Eggplant #894585 ΔE 0.083
- Brownish Purple #76424E ΔE 0.088
Use #613D79 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.