#643523
Closest named color: Purple Brown (#673A3F). oklch(38.5% 0.073 41.4), rgb(100, 53, 35).
Aa
White text reads best on this color (10.11:1).
About this color
#643523 is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.073 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.040 away. White text reads best on it, at 10.11:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.07:1 |
| White text | 10.11:1 |
Values
| HEX | #643523 |
| RGB | rgb(100, 53, 35) |
| HSL | hsl(17, 48%, 26%) |
| OKLCH | oklch(38.5% 0.073 41.4) |
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 #643523 | 10.11:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #643523 | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #643523 text on white | 10.11:1 | AAA | Lc 93.2 | Preferred for body text |
| #643523 text on black | 2.07:1 | Fails | Lc -9.3 | 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
#F4E7E2
oklch(93.7% 0.016 42.4)
-
Step 200
200
#ECD3CA
oklch(88.5% 0.031 40.9)
-
Step 300
300
#E1B6A6
oklch(81% 0.055 41.4)
-
Step 400
400
#D08E75
oklch(70.7% 0.088 41.6)
-
Step 500
500
#C27152
oklch(63.1% 0.112 41.5)
-
Step 600
600
#AE5736
oklch(55.6% 0.123 40.8)
-
Step 700
700
#954728
oklch(49.1% 0.114 41.4)
-
Step 800
800
#793B22
oklch(42.7% 0.094 41.8)
-
Step 900
900 (this color)
#643523
oklch(38.5% 0.073 41.4)
-
Step 950
950
#391E14
oklch(26.9% 0.046 40.9)
#643523 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) | #413B21 | 0.069 |
| Deuteranopia (no green cones) | #4D4622 | 0.064 |
| Tritanopia (no blue cones) | #6D2C31 | 0.039 |
| Achromatopsia (no color) | #424242 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643523
#643523
oklch(38.5% 0.073 41.4)
- #004C5E
#004C5E
oklch(38.6% 0.07 220.6)
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 #643523, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.040
- Chestnut #742802 ΔE 0.042
- Mud Brown #60460F ΔE 0.059
- Reddy Brown #6E1005 ΔE 0.069
- Brownish Purple #76424E ΔE 0.076
- Red Brown #8B2E16 ΔE 0.078
- Rust Brown #8B3103 ΔE 0.080
- Blood #770001 ΔE 0.081
Use #643523 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.