#673B9B
Closest named color: Rebecca Purple (#663399). oklch(45.4% 0.151 301.8), rgb(103, 59, 155).
Aa
White text reads best on this color (7.84:1).
About this color
#673B9B is a medium-dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.151 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.017 away. White text reads best on it, at 7.84:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.67:1 |
| White text | 7.84:1 |
Values
| HEX | #673B9B |
| RGB | rgb(103, 59, 155) |
| HSL | hsl(267, 45%, 42%) |
| OKLCH | oklch(45.4% 0.151 301.8) |
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 #673B9B | 7.84:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #673B9B | 2.67:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #673B9B text on white | 7.84:1 | AAA | Lc 86.8 | Fine for body text |
| #673B9B text on black | 2.67:1 | Fails | Lc -15.3 | 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 800.
-
Step 50
50
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F9
oklch(93.6% 0.026 302.6)
-
Step 200
200
#DFD2F5
oklch(88.5% 0.049 302.3)
-
Step 300
300
#CBB4F1
oklch(81% 0.088 301.7)
-
Step 400
400
#B18AEA
oklch(70.8% 0.141 301.6)
-
Step 500
500
#9F69E3
oklch(63.2% 0.181 301.9)
-
Step 600
600
#8A4CD1
oklch(55.6% 0.197 301.7)
-
Step 700
700
#753CB5
oklch(49.1% 0.183 301.6)
-
Step 800
800 (this color)
#673B9B
oklch(45.4% 0.151 301.8)
-
Step 900
900
#4E2E75
oklch(37.8% 0.118 301.8)
-
Step 950
950
#2D1C44
oklch(27% 0.073 301.3)
#673B9B 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) | #00519E | 0.119 |
| Deuteranopia (no green cones) | #1E5199 | 0.108 |
| Tritanopia (no blue cones) | #5D4F65 | 0.113 |
| Achromatopsia (no color) | #525252 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673B9B
#673B9B
oklch(45.4% 0.151 301.8)
- #4D5F00
#4D5F00
oklch(45.4% 0.11 121.6)
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 #673B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.017
- Blueberry #464196 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.072
- Twilight #4E518B ΔE 0.074
- Grape #7209B7 ΔE 0.078
- Blue With A Hint Of Purple #533CC6 ΔE 0.079
- Light Eggplant #894585 ΔE 0.084
Use #673B9B 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.