#643128
Closest named color: Purple Brown (#673A3F). oklch(37.8% 0.076 31.3), rgb(100, 49, 40).
Aa
White text reads best on this color (10.43:1).
About this color
#643128 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.076 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.037 away. White text reads best on it, at 10.43:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.076) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.01:1 |
| White text | 10.43:1 |
Values
| HEX | #643128 |
| RGB | rgb(100, 49, 40) |
| HSL | hsl(9, 43%, 27%) |
| OKLCH | oklch(37.8% 0.076 31.3) |
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 #643128 | 10.43:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #643128 | 2.01:1 | Fails | Lc 10.0 | Not readable |
| #643128 text on white | 10.43:1 | AAA | Lc 93.9 | Preferred for body text |
| #643128 text on black | 2.01:1 | Fails | Lc -8.6 | 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F5E6E3
oklch(93.6% 0.017 31.1)
-
Step 200
200
#EDD2CD
oklch(88.5% 0.031 30.2)
-
Step 300
300
#E3B4AA
oklch(80.9% 0.057 32.1)
-
Step 400
400
#D38B7E
oklch(70.7% 0.091 30.7)
-
Step 500
500
#C66D5D
oklch(63.2% 0.116 31.3)
-
Step 600
600
#B15343
oklch(55.6% 0.126 31.3)
-
Step 700
700
#984335
oklch(49.2% 0.117 31.2)
-
Step 800
800
#7B382C
oklch(42.7% 0.096 31.7)
-
Step 900
900 (this color)
#643128
oklch(37.8% 0.076 31.3)
-
Step 950
950
#3B1D18
oklch(27.1% 0.048 30.5)
#643128 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) | #3D3927 | 0.077 |
| Deuteranopia (no green cones) | #4A4427 | 0.071 |
| Tritanopia (no blue cones) | #6D292F | 0.030 |
| Achromatopsia (no color) | #404040 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643128
#643128
oklch(37.8% 0.076 31.3)
- #004B56
#004B56
oklch(37.9% 0.066 211.4)
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 #643128, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.037
- Chestnut #742802 ΔE 0.044
- Reddy Brown #6E1005 ΔE 0.061
- Mud Brown #60460F ΔE 0.073
- Blood #770001 ΔE 0.074
- Brownish Purple #76424E ΔE 0.075
- Wine Red #7B0323 ΔE 0.076
- Claret #680018 ΔE 0.078
Use #643128 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.