#673F90
Closest named color: Rebecca Purple (#663399). oklch(45.3% 0.131 304.5), rgb(103, 63, 144).
Aa
White text reads best on this color (7.80:1).
About this color
#673F90 is a medium-dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.131 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.032 away. White text reads best on it, at 7.80:1.
| Hue family | Purples |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #673F90 |
| RGB | rgb(103, 63, 144) |
| HSL | hsl(270, 39%, 41%) |
| OKLCH | oklch(45.3% 0.131 304.5) |
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 #673F90 | 7.80:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #673F90 | 2.69:1 | Fails | Lc 17.2 | Dividers and decoration only |
| #673F90 text on white | 7.80:1 | AAA | Lc 86.8 | Fine for body text |
| #673F90 text on black | 2.69:1 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F6
oklch(93.5% 0.023 305.6)
-
Step 200
200
#DFD3F1
oklch(88.6% 0.043 303.7)
-
Step 300
300
#CCB5E9
oklch(81% 0.076 304.9)
-
Step 400
400
#B28CDE
oklch(70.7% 0.123 304.8)
-
Step 500
500
#9F6DD5
oklch(63% 0.157 304.5)
-
Step 600
600
#8A53C2
oklch(55.6% 0.17 304.3)
-
Step 700
700
#7642A8
oklch(49.1% 0.16 304.7)
-
Step 800
800 (this color)
#673F90
oklch(45.3% 0.131 304.5)
-
Step 900
900
#4E316D
oklch(37.7% 0.102 304.3)
-
Step 950
950
#2E1D40
oklch(27% 0.066 304.8)
#673F90 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) | #225193 | 0.102 |
| Deuteranopia (no green cones) | #30528E | 0.092 |
| Tritanopia (no blue cones) | #604E61 | 0.097 |
| Achromatopsia (no color) | #525252 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673F90
#673F90
oklch(45.3% 0.131 304.5)
- #496000
#496000
oklch(45.4% 0.113 124.2)
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 #673F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.058
- Twilight #4E518B ΔE 0.061
- Light Eggplant #894585 ΔE 0.072
- Dusk #4E5481 ΔE 0.074
- Bluey Purple #6241C7 ΔE 0.088
- Dusty Grape #545775 ΔE 0.090
Use #673F90 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.