#615BCF
Closest named color: Dark Periwinkle (#665FD1). oklch(54% 0.174 281.2), rgb(97, 91, 207).
Aa
White text reads best on this color (5.37:1).
About this color
#615BCF is a medium-dark, vivid purple. In OKLCH its lightness is 54%, its chroma 0.174 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.013 away. White text reads best on it, at 5.37:1.
| Hue family | Purples |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #615BCF |
| RGB | rgb(97, 91, 207) |
| HSL | hsl(243, 55%, 58%) |
| OKLCH | oklch(54% 0.174 281.2) |
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 #615BCF | 5.37:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #615BCF | 3.90:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #615BCF text on white | 5.37:1 | AA | Lc 76.5 | Fine for body text |
| #615BCF text on black | 3.90:1 | AA large text | Lc -25.3 | Dividers and decoration only |
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 600.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D3D6F6
oklch(88.4% 0.044 281.2)
-
Step 300
300
#B7BBF3
oklch(80.8% 0.079 281.3)
-
Step 400
400
#9396ED
oklch(70.6% 0.126 281.1)
-
Step 500
500
#7B7AE7
oklch(63.2% 0.16 281.2)
-
Step 600
600 (this color)
#615BCF
oklch(54% 0.174 281.2)
-
Step 700
700
#554FB8
oklch(49.2% 0.161 281.3)
-
Step 800
800
#454195
oklch(42.7% 0.134 281.2)
-
Step 900
900
#393877
oklch(37.7% 0.105 280.8)
-
Step 950
950
#212146
oklch(26.9% 0.067 280.9)
#615BCF 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) | #026FD3 | 0.081 |
| Deuteranopia (no green cones) | #0066CD | 0.079 |
| Tritanopia (no blue cones) | #31768C | 0.150 |
| Achromatopsia (no color) | #6A6A6A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #615BCF
#615BCF
oklch(54% 0.174 281.2)
- #7D7000
#7D7000
oklch(54% 0.113 101.3)
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 #615BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.013
- Slate Blue #6A5ACD ΔE 0.014
- Iris #6258C4 ΔE 0.018
- Light Indigo #6D5ACF ΔE 0.018
- Warm Blue #4B57DB ΔE 0.038
- Royal Blue #4169E1 ΔE 0.053
- Bluey Purple #6241C7 ΔE 0.057
- Neon Blue #4361EE ΔE 0.060
Use #615BCF 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.