#66499D
Closest named color: Rebecca Purple (#663399). oklch(47.8% 0.132 297.1), rgb(102, 73, 157).
Aa
White text reads best on this color (6.98:1).
About this color
#66499D is a medium-dark, moderately saturated purple. In OKLCH its lightness is 48%, its chroma 0.132 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.050 away. White text reads best on it, at 6.98:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 3.00:1 |
| White text | 6.98:1 |
Values
| HEX | #66499D |
| RGB | rgb(102, 73, 157) |
| HSL | hsl(261, 37%, 45%) |
| OKLCH | oklch(47.8% 0.132 297.1) |
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 #66499D | 6.98:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #66499D | 3.00:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #66499D text on white | 6.98:1 | AA | Lc 84.0 | Fine for body text |
| #66499D text on black | 3.00:1 | AA large text | Lc -18.0 | 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
#EBE8F5
oklch(93.7% 0.018 296.6)
-
Step 200
200
#DBD5EE
oklch(88.5% 0.035 296.7)
-
Step 300
300
#C4B9E6
oklch(81% 0.064 296.2)
-
Step 400
400
#A793D9
oklch(70.7% 0.102 296.8)
-
Step 500
500
#9277CE
oklch(63.1% 0.13 296.8)
-
Step 600
600
#7D5EBB
oklch(55.6% 0.142 296.9)
-
Step 700
700 (this color)
#66499D
oklch(47.8% 0.132 297.1)
-
Step 800
800
#563F83
oklch(42.6% 0.11 297.1)
-
Step 900
900
#473669
oklch(37.6% 0.086 297.5)
-
Step 950
950
#29203D
oklch(26.9% 0.054 296.9)
#66499D 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) | #2859A0 | 0.087 |
| Deuteranopia (no green cones) | #30589B | 0.081 |
| Tritanopia (no blue cones) | #5A5A6C | 0.104 |
| Achromatopsia (no color) | #595959 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66499D
#66499D
oklch(47.8% 0.132 297.1)
- #596400
#596400
oklch(47.7% 0.11 117)
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 #66499D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.050
- Twilight #4E518B ΔE 0.054
- Blueberry #464196 ΔE 0.061
- Iris #6258C4 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.068
- Dusk #4E5481 ΔE 0.070
- Bluey Purple #6241C7 ΔE 0.071
- Dusky Blue #475F94 ΔE 0.075
Use #66499D 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.