#64437D
Closest named color: Twilight (#4E518B). oklch(44.5% 0.099 309.1), rgb(100, 67, 125).
Aa
White text reads best on this color (7.95:1).
About this color
#64437D is a dark, moderately saturated purple. In OKLCH its lightness is 45%, its chroma 0.099 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.051 away. White text reads best on it, at 7.95:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.64:1 |
| White text | 7.95:1 |
Values
| HEX | #64437D |
| RGB | rgb(100, 67, 125) |
| HSL | hsl(274, 30%, 38%) |
| OKLCH | oklch(44.5% 0.099 309.1) |
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 #64437D | 7.95:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #64437D | 2.64:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #64437D text on white | 7.95:1 | AAA | Lc 87.4 | Fine for body text |
| #64437D text on black | 2.64:1 | Fails | Lc -14.7 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#DFD4EA
oklch(88.5% 0.032 308.1)
-
Step 300
300
#CCB7DD
oklch(80.9% 0.057 309.9)
-
Step 400
400
#B291CD
oklch(70.8% 0.093 309.2)
-
Step 500
500
#9E74BF
oklch(63% 0.118 309.1)
-
Step 600
600
#895CAC
oklch(55.6% 0.128 308.7)
-
Step 700
700
#754B93
oklch(49.1% 0.119 309.6)
-
Step 800
800 (this color)
#64437D
oklch(44.5% 0.099 309.1)
-
Step 900
900
#4E3560
oklch(37.7% 0.077 309.9)
-
Step 950
950
#2D1F38
oklch(26.8% 0.049 309.1)
#64437D 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) | #364F7F | 0.075 |
| Deuteranopia (no green cones) | #3E517B | 0.069 |
| Tritanopia (no blue cones) | #614C5A | 0.070 |
| Achromatopsia (no color) | #515151 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64437D
#64437D
oklch(44.5% 0.099 309.1)
- #425E1B
#425E1B
oklch(44.5% 0.099 129.3)
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 #64437D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.051
- Dusk #4E5481 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.060
- Rebecca Purple #663399 ΔE 0.063
- Dusty Grape #545775 ΔE 0.065
- Blueberry #464196 ΔE 0.068
- Light Eggplant #894585 ΔE 0.072
- YInMn Blue #415A77 ΔE 0.084
Use #64437D 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.