#613C77
Closest named color: Dark Slate Blue (#483D8B). oklch(42.6% 0.103 311.7), rgb(97, 60, 119).
Aa
White text reads best on this color (8.67:1).
About this color
#613C77 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.103 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 8.67:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #613C77 |
| RGB | rgb(97, 60, 119) |
| HSL | hsl(278, 33%, 35%) |
| OKLCH | oklch(42.6% 0.103 311.7) |
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 #613C77 | 8.67:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #613C77 | 2.42:1 | Fails | Lc 14.4 | Not readable |
| #613C77 text on white | 8.67:1 | AAA | Lc 89.5 | Fine for body text |
| #613C77 text on black | 2.42:1 | Fails | Lc -12.7 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EEE7F3
oklch(93.7% 0.018 311.6)
-
Step 200
200
#E0D3EA
oklch(88.4% 0.034 310.7)
-
Step 300
300
#CEB6DD
oklch(80.9% 0.06 312.4)
-
Step 400
400
#B48FCC
oklch(70.6% 0.096 311.6)
-
Step 500
500
#A272BF
oklch(63% 0.123 311.9)
-
Step 600
600
#8D5AAB
oklch(55.7% 0.132 311.8)
-
Step 700
700
#784993
oklch(49.1% 0.124 311.9)
-
Step 800
800 (this color)
#613C77
oklch(42.6% 0.103 311.7)
-
Step 900
900
#503460
oklch(37.7% 0.08 312.3)
-
Step 950
950
#2F1F38
oklch(27.1% 0.05 312.7)
#613C77 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) | #2F4979 | 0.083 |
| Deuteranopia (no green cones) | #394C75 | 0.076 |
| Tritanopia (no blue cones) | #5F4554 | 0.070 |
| Achromatopsia (no color) | #4B4B4B | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613C77
#613C77
oklch(42.6% 0.103 311.7)
- #395A15
#395A15
oklch(42.7% 0.103 131.8)
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 #613C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.062
- Twilight #4E518B ΔE 0.064
- Dusk #4E5481 ΔE 0.069
- Blueberry #464196 ΔE 0.069
- Dusty Grape #545775 ΔE 0.078
- Light Eggplant #894585 ΔE 0.084
- Brownish Purple #76424E ΔE 0.086
Use #613C77 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.