#643121
Closest named color: Chestnut (#742802). oklch(37.7% 0.078 38.1), rgb(100, 49, 33).
Aa
White text reads best on this color (10.48:1).
About this color
#643121 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.078 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.039 away. White text reads best on it, at 10.48:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.00:1 |
| White text | 10.48:1 |
Values
| HEX | #643121 |
| RGB | rgb(100, 49, 33) |
| HSL | hsl(14, 50%, 26%) |
| OKLCH | oklch(37.7% 0.078 38.1) |
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 #643121 | 10.48:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #643121 | 2.00:1 | Fails | Lc 9.9 | Not readable |
| #643121 text on white | 10.48:1 | AAA | Lc 94.0 | Preferred for body text |
| #643121 text on black | 2.00:1 | 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
#FBF4F2
oklch(97.2% 0.008 36.6)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EDD2CA
oklch(88.4% 0.032 37.1)
-
Step 300
300
#E3B4A6
oklch(80.8% 0.058 37.2)
-
Step 400
400
#D48C75
oklch(70.8% 0.095 38.5)
-
Step 500
500
#C66D52
oklch(63% 0.12 37.7)
-
Step 600
600
#B25436
oklch(55.7% 0.13 38.2)
-
Step 700
700
#984328
oklch(49% 0.121 38)
-
Step 800
800
#7C3823
oklch(42.7% 0.1 37.8)
-
Step 900
900 (this color)
#643121
oklch(37.7% 0.078 38.1)
-
Step 950
950
#3B1D14
oklch(27% 0.05 37.5)
#643121 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) | #3E391F | 0.076 |
| Deuteranopia (no green cones) | #4B4420 | 0.070 |
| Tritanopia (no blue cones) | #6E282D | 0.037 |
| Achromatopsia (no color) | #3F3F3F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643121
#643121
oklch(37.7% 0.078 38.1)
- #004A59
#004A59
oklch(37.7% 0.067 217.2)
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 #643121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.039
- Purple Brown #673A3F ΔE 0.044
- Reddy Brown #6E1005 ΔE 0.059
- Mud Brown #60460F ΔE 0.067
- Blood #770001 ΔE 0.073
- Maroon #800000 ΔE 0.078
- Wine Red #7B0323 ΔE 0.079
- Red Brown #8B2E16 ΔE 0.080
Use #643121 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.