#673B7D
Closest named color: Rebecca Purple (#663399). oklch(43.5% 0.115 313.3), rgb(103, 59, 125).
Aa
White text reads best on this color (8.40:1).
About this color
#673B7D is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.052 away. White text reads best on it, at 8.40:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.49:1 |
| White text | 8.40:1 |
Values
| HEX | #673B7D |
| RGB | rgb(103, 59, 125) |
| HSL | hsl(280, 36%, 36%) |
| OKLCH | oklch(43.5% 0.115 313.3) |
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 #673B7D | 8.40:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #673B7D | 2.49:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #673B7D text on white | 8.40:1 | AAA | Lc 88.7 | Fine for body text |
| #673B7D text on black | 2.49:1 | Fails | Lc -13.5 | 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
#F8F4FA
oklch(97.2% 0.009 314.8)
-
Step 100
100
#EEE6F3
oklch(93.5% 0.019 312.8)
-
Step 200
200
#E2D2EB
oklch(88.4% 0.038 313.6)
-
Step 300
300
#D0B4E0
oklch(80.8% 0.068 313.2)
-
Step 400
400
#B88CD0
oklch(70.6% 0.108 313.2)
-
Step 500
500
#A66EC4
oklch(63% 0.138 313)
-
Step 600
600
#9255B0
oklch(55.7% 0.148 313.5)
-
Step 700
700
#7C4497
oklch(49% 0.139 313.6)
-
Step 800
800 (this color)
#673B7D
oklch(43.5% 0.115 313.3)
-
Step 900
900
#523263
oklch(37.8% 0.089 312.9)
-
Step 950
950
#301D3A
oklch(26.9% 0.058 313.2)
#673B7D 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) | #2C4B7F | 0.097 |
| Deuteranopia (no green cones) | #394E7B | 0.087 |
| Tritanopia (no blue cones) | #654556 | 0.077 |
| Achromatopsia (no color) | #4D4D4D | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673B7D
#673B7D
oklch(43.5% 0.115 313.3)
- #365E0E
#365E0E
oklch(43.6% 0.115 133.3)
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 #673B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.061
- Twilight #4E518B ΔE 0.068
- Blueberry #464196 ΔE 0.071
- Light Eggplant #894585 ΔE 0.073
- Dusk #4E5481 ΔE 0.075
- Dusty Grape #545775 ΔE 0.085
- Purple #800080 ΔE 0.089
Use #673B7D 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.