#643327
Closest named color: Purple Brown (#673A3F). oklch(38.2% 0.074 34.8), rgb(100, 51, 39).
Aa
White text reads best on this color (10.27:1).
About this color
#643327 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.074 and its hue 35°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.036 away. White text reads best on it, at 10.27:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #643327 |
| RGB | rgb(100, 51, 39) |
| HSL | hsl(12, 44%, 27%) |
| OKLCH | oklch(38.2% 0.074 34.8) |
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 #643327 | 10.27:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #643327 | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #643327 text on white | 10.27:1 | AAA | Lc 93.5 | Preferred for body text |
| #643327 text on black | 2.04:1 | Fails | Lc -9.0 | 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
#F4E6E3
oklch(93.5% 0.016 32)
-
Step 200
200
#EDD2CC
oklch(88.5% 0.031 32.6)
-
Step 300
300
#E2B5A9
oklch(81% 0.055 35.4)
-
Step 400
400
#D18D7B
oklch(70.7% 0.088 35.5)
-
Step 500
500
#C46F5A
oklch(63.2% 0.113 34.8)
-
Step 600
600
#AF553F
oklch(55.6% 0.123 34.9)
-
Step 700
700
#964531
oklch(49.1% 0.114 35)
-
Step 800
800
#7A3929
oklch(42.7% 0.095 35)
-
Step 900
900 (this color)
#643327
oklch(38.2% 0.074 34.8)
-
Step 950
950
#3A1E16
oklch(27.1% 0.046 36.8)
#643327 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) | #3F3A26 | 0.073 |
| Deuteranopia (no green cones) | #4B4526 | 0.068 |
| Tritanopia (no blue cones) | #6D2B30 | 0.032 |
| Achromatopsia (no color) | #414141 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643327
#643327
oklch(38.2% 0.074 34.8)
- #004C59
#004C59
oklch(38.3% 0.067 214.1)
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 #643327, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.036
- Chestnut #742802 ΔE 0.043
- Reddy Brown #6E1005 ΔE 0.065
- Mud Brown #60460F ΔE 0.067
- Brownish Purple #76424E ΔE 0.074
- Blood #770001 ΔE 0.077
- Red Brown #8B2E16 ΔE 0.080
- Wine Red #7B0323 ΔE 0.080
Use #643327 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.