#673F9C
Closest named color: Rebecca Purple (#663399). oklch(46.1% 0.146 300.6), rgb(103, 63, 156).
Aa
White text reads best on this color (7.58:1).
About this color
#673F9C is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.146 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.026 away. White text reads best on it, at 7.58:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.76:1 |
| White text | 7.58:1 |
Values
| HEX | #673F9C |
| RGB | rgb(103, 63, 156) |
| HSL | hsl(266, 42%, 43%) |
| OKLCH | oklch(46.1% 0.146 300.6) |
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 #673F9C | 7.58:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #673F9C | 2.76:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #673F9C text on white | 7.58:1 | AAA | Lc 86.0 | Fine for body text |
| #673F9C text on black | 2.76:1 | Fails | Lc -16.1 | 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 700.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F6
oklch(93.6% 0.021 301.1)
-
Step 200
200
#DDD4F0
oklch(88.6% 0.039 300.2)
-
Step 300
300
#C8B7E8
oklch(81% 0.07 300.7)
-
Step 400
400
#AC90DC
oklch(70.7% 0.112 300.5)
-
Step 500
500
#9872D3
oklch(63.1% 0.145 300.4)
-
Step 600
600
#8358C0
oklch(55.5% 0.158 300.4)
-
Step 700
700 (this color)
#673F9C
oklch(46.1% 0.146 300.6)
-
Step 800
800
#5B3C86
oklch(42.8% 0.12 300.8)
-
Step 900
900
#4A346B
oklch(37.7% 0.093 300.5)
-
Step 950
950
#2B1F3F
oklch(27% 0.059 299.7)
#673F9C 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) | #0F549F | 0.111 |
| Deuteranopia (no green cones) | #23539A | 0.101 |
| Tritanopia (no blue cones) | #5C5267 | 0.111 |
| Achromatopsia (no color) | #545454 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673F9C
#673F9C
oklch(46.1% 0.146 300.6)
- #506100
#506100
oklch(46.2% 0.111 120.8)
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 #673F9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.026
- Blueberry #464196 ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.062
- Twilight #4E518B ΔE 0.068
- Bluey Purple #6241C7 ΔE 0.069
- Blue With A Hint Of Purple #533CC6 ΔE 0.078
- Light Eggplant #894585 ΔE 0.080
- Iris #6258C4 ΔE 0.082
Use #673F9C 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.