#613B7C
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.111 309.5), rgb(97, 59, 124).
Aa
White text reads best on this color (8.66:1).
About this color
#613B7C is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.111 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 8.66:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #613B7C |
| RGB | rgb(97, 59, 124) |
| HSL | hsl(275, 36%, 36%) |
| OKLCH | oklch(42.7% 0.111 309.5) |
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 #613B7C | 8.66:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #613B7C | 2.42:1 | Fails | Lc 14.5 | Not readable |
| #613B7C text on white | 8.66:1 | AAA | Lc 89.5 | Fine for body text |
| #613B7C text on black | 2.42:1 | Fails | Lc -12.8 | 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
#EDE7F4
oklch(93.6% 0.018 306.7)
-
Step 200
200
#E0D3EC
oklch(88.5% 0.037 308.8)
-
Step 300
300
#CDB6E1
oklch(81% 0.064 309.1)
-
Step 400
400
#B48ED1
oklch(70.6% 0.104 309.8)
-
Step 500
500
#A171C5
oklch(63.1% 0.132 309.4)
-
Step 600
600
#8C58B2
oklch(55.6% 0.143 309.1)
-
Step 700
700
#774799
oklch(49% 0.134 309.3)
-
Step 800
800 (this color)
#613B7C
oklch(42.7% 0.111 309.5)
-
Step 900
900
#4F3364
oklch(37.7% 0.087 309.2)
-
Step 950
950
#2E1E3A
oklch(26.9% 0.055 309.4)
#613B7C 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) | #2A4A7E | 0.089 |
| Deuteranopia (no green cones) | #354C7A | 0.081 |
| Tritanopia (no blue cones) | #5E4656 | 0.078 |
| Achromatopsia (no color) | #4B4B4B | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613B7C
#613B7C
oklch(42.7% 0.111 309.5)
- #3B5A05
#3B5A05
oklch(42.7% 0.111 129.4)
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 #613B7C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Rebecca Purple #663399 ΔE 0.053
- Blueberry #464196 ΔE 0.063
- Twilight #4E518B ΔE 0.064
- Dusk #4E5481 ΔE 0.071
- Dusty Grape #545775 ΔE 0.083
- Light Eggplant #894585 ΔE 0.084
- Brownish Purple #76424E ΔE 0.095
Use #613B7C 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.