#644AA5
Closest named color: Rebecca Purple (#663399). oklch(48.3% 0.141 293.6), rgb(100, 74, 165).
Aa
White text reads best on this color (6.85:1).
About this color
#644AA5 is a medium-dark, vivid purple. In OKLCH its lightness is 48%, its chroma 0.141 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.053 away. White text reads best on it, at 6.85:1.
| Hue family | Purples |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #644AA5 |
| RGB | rgb(100, 74, 165) |
| HSL | hsl(257, 38%, 47%) |
| OKLCH | oklch(48.3% 0.141 293.6) |
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 #644AA5 | 6.85:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #644AA5 | 3.06:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #644AA5 text on white | 6.85:1 | AA | Lc 83.4 | Fine for body text |
| #644AA5 text on black | 3.06:1 | AA large text | Lc -18.5 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#DAD5F0
oklch(88.5% 0.037 294.1)
-
Step 300
300
#C2B9E9
oklch(80.9% 0.068 293.4)
-
Step 400
400
#A493DE
oklch(70.7% 0.109 293.8)
-
Step 500
500
#8E77D5
oklch(63.1% 0.139 293.3)
-
Step 600
600
#795DC2
oklch(55.5% 0.152 293.6)
-
Step 700
700 (this color)
#644AA5
oklch(48.3% 0.141 293.6)
-
Step 800
800
#533F88
oklch(42.6% 0.117 293.4)
-
Step 900
900
#45366D
oklch(37.7% 0.092 294.1)
-
Step 950
950
#282040
oklch(27% 0.059 293.6)
#644AA5 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) | #205BA8 | 0.088 |
| Deuteranopia (no green cones) | #2759A3 | 0.084 |
| Tritanopia (no blue cones) | #535D70 | 0.114 |
| Achromatopsia (no color) | #5A5A5A | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644AA5
#644AA5
oklch(48.3% 0.141 293.6)
- #5F6400
#5F6400
oklch(48.2% 0.108 113.1)
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 #644AA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.053
- Iris #6258C4 ΔE 0.056
- Bluey Purple #6241C7 ΔE 0.059
- Twilight #4E518B ΔE 0.059
- Blueberry #464196 ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- Slate Blue #6A5ACD ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
Use #644AA5 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.