#613F75
Closest named color: Dark Slate Blue (#483D8B). oklch(43% 0.095 312), rgb(97, 63, 117).
Aa
White text reads best on this color (8.48:1).
About this color
#613F75 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.095 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 0.059 away. White text reads best on it, at 8.48:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.095) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.47:1 |
| White text | 8.48:1 |
Values
| HEX | #613F75 |
| RGB | rgb(97, 63, 117) |
| HSL | hsl(278, 30%, 35%) |
| OKLCH | oklch(43% 0.095 312) |
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 #613F75 | 8.48:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #613F75 | 2.47:1 | Fails | Lc 15.0 | Not readable |
| #613F75 text on white | 8.48:1 | AAA | Lc 89.0 | Fine for body text |
| #613F75 text on black | 2.47:1 | Fails | Lc -13.2 | 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
#EDE7F2
oklch(93.6% 0.016 310.1)
-
Step 200
200
#E0D4E8
oklch(88.6% 0.03 312.1)
-
Step 300
300
#CDB7DB
oklch(80.9% 0.055 312.3)
-
Step 400
400
#B391C9
oklch(70.7% 0.088 311.7)
-
Step 500
500
#A075BB
oklch(63.2% 0.112 311.6)
-
Step 600
600
#8B5CA7
oklch(55.6% 0.123 311.8)
-
Step 700
700
#764B8F
oklch(49% 0.115 312)
-
Step 800
800 (this color)
#613F75
oklch(43% 0.095 312)
-
Step 900
900
#4F355E
oklch(37.7% 0.075 312.3)
-
Step 950
950
#2E1F37
oklch(26.9% 0.048 312.1)
#613F75 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) | #344B77 | 0.075 |
| Deuteranopia (no green cones) | #3D4E74 | 0.069 |
| Tritanopia (no blue cones) | #5F4754 | 0.066 |
| Achromatopsia (no color) | #4D4D4D | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613F75
#613F75
oklch(43% 0.095 312)
- #3C5A1E
#3C5A1E
oklch(43% 0.094 131.8)
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 #613F75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.059
- Twilight #4E518B ΔE 0.060
- Dusk #4E5481 ΔE 0.062
- Rebecca Purple #663399 ΔE 0.069
- Dusty Grape #545775 ΔE 0.069
- Blueberry #464196 ΔE 0.072
- Brownish Purple #76424E ΔE 0.080
- Light Eggplant #894585 ΔE 0.082
Use #613F75 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.