#64374E
Closest named color: Purple Brown (#673A3F). oklch(40.1% 0.071 348.8), rgb(100, 55, 78).
Aa
White text reads best on this color (9.55:1).
About this color
#64374E is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.071 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.030 away. White text reads best on it, at 9.55:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #64374E |
| RGB | rgb(100, 55, 78) |
| HSL | hsl(329, 29%, 30%) |
| OKLCH | oklch(40.1% 0.071 348.8) |
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 #64374E | 9.55:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #64374E | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #64374E text on white | 9.55:1 | AAA | Lc 91.9 | Preferred for body text |
| #64374E text on black | 2.19:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F9F4F6
oklch(97.2% 0.006 350.8)
-
Step 100
100
#F2E6EB
oklch(93.6% 0.015 350.1)
-
Step 200
200
#E9D2DC
oklch(88.6% 0.029 349.5)
-
Step 300
300
#DCB3C6
oklch(80.9% 0.053 348.8)
-
Step 400
400
#C98BA9
oklch(70.7% 0.085 349)
-
Step 500
500
#BA6D94
oklch(63.1% 0.109 349)
-
Step 600
600
#A5547E
oklch(55.6% 0.118 349.2)
-
Step 700
700
#8D446B
oklch(49.1% 0.11 348.6)
-
Step 800
800
#733857
oklch(42.7% 0.092 348.9)
-
Step 900
900 (this color)
#64374E
oklch(40.1% 0.071 348.8)
-
Step 950
950
#371D2A
oklch(27.1% 0.045 349.2)
#64374E 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) | #3B414F | 0.077 |
| Deuteranopia (no green cones) | #47484D | 0.069 |
| Tritanopia (no blue cones) | #6A363F | 0.027 |
| Achromatopsia (no color) | #454545 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64374E
#64374E
oklch(40.1% 0.071 348.8)
- #145441
#145441
oklch(40.1% 0.071 168.8)
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 #64374E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.030
- Brownish Purple #76424E ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.082
- Grape Purple #5D1451 ΔE 0.084
- Velvet #750851 ΔE 0.085
- Red Purple #820747 ΔE 0.087
- Merlot #730039 ΔE 0.087
- Wine #80013F ΔE 0.089
Use #64374E 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.