#613F77
Closest named color: Dark Slate Blue (#483D8B). oklch(43.1% 0.097 310.9), rgb(97, 63, 119).
Aa
White text reads best on this color (8.44:1).
About this color
#613F77 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.097 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 8.44:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.48:1 |
| White text | 8.44:1 |
Values
| HEX | #613F77 |
| RGB | rgb(97, 63, 119) |
| HSL | hsl(276, 31%, 36%) |
| OKLCH | oklch(43.1% 0.097 310.9) |
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 #613F77 | 8.44:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #613F77 | 2.48:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #613F77 text on white | 8.44:1 | AAA | Lc 88.9 | Fine for body text |
| #613F77 text on black | 2.48:1 | Fails | Lc -13.3 | 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
#E0D4E9
oklch(88.6% 0.031 311)
-
Step 300
300
#CCB7DC
oklch(80.9% 0.056 310.5)
-
Step 400
400
#B391CB
oklch(70.8% 0.091 310.8)
-
Step 500
500
#A074BD
oklch(63.1% 0.116 311.1)
-
Step 600
600
#8B5CA9
oklch(55.7% 0.125 311)
-
Step 700
700
#764B91
oklch(49.1% 0.117 311.1)
-
Step 800
800 (this color)
#613F77
oklch(43.1% 0.097 310.9)
-
Step 900
900
#4E355F
oklch(37.6% 0.076 310.6)
-
Step 950
950
#2E1F38
oklch(27% 0.049 310.9)
#613F77 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) | #334B79 | 0.076 |
| Deuteranopia (no green cones) | #3C4E75 | 0.070 |
| Tritanopia (no blue cones) | #5F4855 | 0.069 |
| Achromatopsia (no color) | #4D4D4D | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613F77
#613F77
oklch(43.1% 0.097 310.9)
- #3D5A1B
#3D5A1B
oklch(43% 0.096 130.7)
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 #613F77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Twilight #4E518B ΔE 0.059
- Dusk #4E5481 ΔE 0.062
- Rebecca Purple #663399 ΔE 0.066
- Blueberry #464196 ΔE 0.069
- Dusty Grape #545775 ΔE 0.070
- Light Eggplant #894585 ΔE 0.082
- Brownish Purple #76424E ΔE 0.082
Use #613F77 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.