#643123
Closest named color: Chestnut (#742802). oklch(37.7% 0.077 36.3), rgb(100, 49, 35).
Aa
White text reads best on this color (10.47:1).
About this color
#643123 is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.077 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.040 away. White text reads best on it, at 10.47:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #643123 |
| RGB | rgb(100, 49, 35) |
| HSL | hsl(13, 48%, 26%) |
| OKLCH | oklch(37.7% 0.077 36.3) |
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 #643123 | 10.47:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #643123 | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #643123 text on white | 10.47:1 | AAA | Lc 94.0 | Preferred for body text |
| #643123 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
#FAF4F2
oklch(97.1% 0.007 39.5)
-
Step 100
100
#F5E6E2
oklch(93.6% 0.017 35.3)
-
Step 200
200
#EDD2CB
oklch(88.4% 0.032 34.9)
-
Step 300
300
#E3B4A7
oklch(80.9% 0.058 36)
-
Step 400
400
#D38C78
oklch(70.7% 0.092 36.4)
-
Step 500
500
#C66D55
oklch(63% 0.119 36)
-
Step 600
600
#B1533A
oklch(55.5% 0.129 35.9)
-
Step 700
700
#98432C
oklch(49% 0.12 36.1)
-
Step 800
800
#7C3825
oklch(42.8% 0.1 36.5)
-
Step 900
900 (this color)
#643123
oklch(37.7% 0.077 36.3)
-
Step 950
950
#3B1D15
oklch(27% 0.049 35.8)
#643123 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) | #3E3922 | 0.076 |
| Deuteranopia (no green cones) | #4A4422 | 0.072 |
| Tritanopia (no blue cones) | #6E282E | 0.036 |
| Achromatopsia (no color) | #3F3F3F | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643123
#643123
oklch(37.7% 0.077 36.3)
- #004A58
#004A58
oklch(37.7% 0.067 215.8)
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 #643123, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.040
- Purple Brown #673A3F ΔE 0.042
- Reddy Brown #6E1005 ΔE 0.060
- Mud Brown #60460F ΔE 0.069
- Blood #770001 ΔE 0.073
- Wine Red #7B0323 ΔE 0.078
- Maroon #800000 ΔE 0.078
- Brownish Purple #76424E ΔE 0.079
Use #643123 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.