#673F88
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.121 307.5), rgb(103, 63, 136).
Aa
White text reads best on this color (7.94:1).
About this color
#673F88 is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.121 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.041 away. White text reads best on it, at 7.94:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.121) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.64:1 |
| White text | 7.94:1 |
Values
| HEX | #673F88 |
| RGB | rgb(103, 63, 136) |
| HSL | hsl(273, 37%, 39%) |
| OKLCH | oklch(44.8% 0.121 307.5) |
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 #673F88 | 7.94:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #673F88 | 2.64:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #673F88 text on white | 7.94:1 | AAA | Lc 87.3 | Fine for body text |
| #673F88 text on black | 2.64:1 | Fails | Lc -14.8 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F5
oklch(93.5% 0.021 306.8)
-
Step 200
200
#E0D3EE
oklch(88.6% 0.039 307.2)
-
Step 300
300
#CDB5E5
oklch(80.9% 0.071 307.5)
-
Step 400
400
#B48DD7
oklch(70.7% 0.113 307.9)
-
Step 500
500
#A16FCD
oklch(63.1% 0.145 307.3)
-
Step 600
600
#8C55B9
oklch(55.6% 0.157 307.5)
-
Step 700
700
#7745A0
oklch(49.1% 0.146 307.2)
-
Step 800
800 (this color)
#673F88
oklch(44.8% 0.121 307.5)
-
Step 900
900
#4F3268
oklch(37.7% 0.094 307.3)
-
Step 950
950
#2E1E3D
oklch(27% 0.059 306.7)
#673F88 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) | #294F8A | 0.096 |
| Deuteranopia (no green cones) | #365186 | 0.086 |
| Tritanopia (no blue cones) | #624C5D | 0.088 |
| Achromatopsia (no color) | #515151 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673F88
#673F88
oklch(44.8% 0.121 307.5)
- #426000
#426000
oklch(44.8% 0.117 127.7)
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 #673F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.057
- Twilight #4E518B ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Light Eggplant #894585 ΔE 0.069
- Dusk #4E5481 ΔE 0.070
- Dusty Grape #545775 ΔE 0.083
- Muted Purple #805B87 ΔE 0.091
Use #673F88 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.