#644079
Closest named color: Twilight (#4E518B). oklch(43.8% 0.099 312), rgb(100, 64, 121).
Aa
White text reads best on this color (8.23:1).
About this color
#644079 is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.099 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.058 away. White text reads best on it, at 8.23:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #644079 |
| RGB | rgb(100, 64, 121) |
| HSL | hsl(278, 31%, 36%) |
| OKLCH | oklch(43.8% 0.099 312) |
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 #644079 | 8.23:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #644079 | 2.55:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #644079 text on white | 8.23:1 | AAA | Lc 88.3 | Fine for body text |
| #644079 text on black | 2.55:1 | Fails | Lc -13.9 | 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
#EEE7F2
oklch(93.7% 0.016 313.6)
-
Step 200
200
#E0D3E9
oklch(88.4% 0.033 311.7)
-
Step 300
300
#CDB6DC
oklch(80.8% 0.058 312)
-
Step 400
400
#B490CB
oklch(70.7% 0.093 311.8)
-
Step 500
500
#A173BD
oklch(63% 0.119 311.9)
-
Step 600
600
#8C5BA9
oklch(55.6% 0.128 311.8)
-
Step 700
700
#774A91
oklch(49.1% 0.119 312)
-
Step 800
800 (this color)
#644079
oklch(43.8% 0.099 312)
-
Step 900
900
#4F355F
oklch(37.8% 0.076 311.6)
-
Step 950
950
#2E1F38
oklch(27% 0.049 310.9)
#644079 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) | #344D7B | 0.080 |
| Deuteranopia (no green cones) | #3D5077 | 0.074 |
| Tritanopia (no blue cones) | #624956 | 0.070 |
| Achromatopsia (no color) | #4F4F4F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644079
#644079
oklch(43.8% 0.099 312)
- #3D5D1D
#3D5D1D
oklch(43.9% 0.099 131.9)
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 #644079, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Dusk #4E5481 ΔE 0.062
- Rebecca Purple #663399 ΔE 0.064
- Dusty Grape #545775 ΔE 0.070
- Blueberry #464196 ΔE 0.071
- Light Eggplant #894585 ΔE 0.075
- Brownish Purple #76424E ΔE 0.082
Use #644079 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.