#6B73CD
Closest named color: Dark Periwinkle (#665FD1). oklch(59.1% 0.136 277.5), rgb(107, 115, 205).
Aa
Black text reads best on this color (4.95:1).
About this color
#6B73CD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.136 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Periwinkle (#665FD1), ΔE 0.053 away. Black text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Dark Periwinkle (#665FD1) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #6B73CD |
| RGB | rgb(107, 115, 205) |
| HSL | hsl(235, 49%, 61%) |
| OKLCH | oklch(59.1% 0.136 277.5) |
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 #6B73CD | 4.23:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #6B73CD | 4.95:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #6B73CD text on white | 4.23:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #6B73CD text on black | 4.95:1 | AA | Lc -32.6 | Non-text elements, placeholder text |
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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D3D8F0
oklch(88.6% 0.033 276.3)
-
Step 300
300
#B6BEE9
oklch(81% 0.061 276.7)
-
Step 400
400
#919BDE
oklch(70.7% 0.099 277)
-
Step 500
500
#7881D4
oklch(63.2% 0.125 277.5)
-
Step 600
600 (this color)
#6B73CD
oklch(59.1% 0.136 277.5)
-
Step 700
700
#5157A7
oklch(49.2% 0.126 277.5)
-
Step 800
800
#424787
oklch(42.7% 0.105 277.6)
-
Step 900
900
#373C6C
oklch(37.6% 0.082 277.2)
-
Step 950
950
#20233F
oklch(26.8% 0.052 277.6)
#6B73CD 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) | #4F7FD0 | 0.042 |
| Deuteranopia (no green cones) | #4777CB | 0.043 |
| Tritanopia (no blue cones) | #478696 | 0.120 |
| Achromatopsia (no color) | #7B7B7B | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B73CD
#6B73CD
oklch(59.1% 0.136 277.5)
- #927D00
#927D00
oklch(59.1% 0.122 97.3)
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 #6B73CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Periwinkle #665FD1 ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.062
- Slate Blue #6A5ACD ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
- Soft Blue #6488EA ΔE 0.063
- Medium Slate Blue #7B68EE ΔE 0.063
- Cornflower #6A79F7 ΔE 0.063
- Medium Purple #9370DB ΔE 0.064
Use #6B73CD 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.