#673F31
Closest named color: Purple Brown (#673A3F). oklch(41.1% 0.061 40), rgb(103, 63, 49).
Aa
White text reads best on this color (9.00:1).
About this color
#673F31 is a dark, muted brown. In OKLCH its lightness is 41%, its chroma 0.061 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.030 away. White text reads best on it, at 9.00:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #673F31 |
| RGB | rgb(103, 63, 49) |
| HSL | hsl(16, 36%, 30%) |
| OKLCH | oklch(41.1% 0.061 40) |
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 #673F31 | 9.00:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #673F31 | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #673F31 text on white | 9.00:1 | AAA | Lc 90.5 | Preferred for body text |
| #673F31 text on black | 2.33:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F8F4F3
oklch(97% 0.005 34.3)
-
Step 100
100
#F0E8E5
oklch(93.6% 0.01 41.9)
-
Step 200
200
#E5D5CF
oklch(88.4% 0.02 41.8)
-
Step 300
300
#D6B9B0
oklch(80.8% 0.036 38)
-
Step 400
400
#C19586
oklch(70.7% 0.058 39.7)
-
Step 500
500
#B07B68
oklch(63.2% 0.072 40.5)
-
Step 600
600
#9B634F
oklch(55.6% 0.079 40.4)
-
Step 700
700
#845240
oklch(49.1% 0.073 40.5)
-
Step 800
800 (this color)
#673F31
oklch(41.1% 0.061 40)
-
Step 900
900
#57392E
oklch(37.6% 0.047 40.9)
-
Step 950
950
#33211B
oklch(26.8% 0.03 39.2)
#673F31 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) | #494430 | 0.056 |
| Deuteranopia (no green cones) | #534C31 | 0.051 |
| Tritanopia (no blue cones) | #70383B | 0.032 |
| Achromatopsia (no color) | #494949 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673F31
#673F31
oklch(41.1% 0.061 40)
- #1D5262
#1D5262
oklch(41.1% 0.061 221.3)
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 #673F31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.030
- Mud Brown #60460F ΔE 0.051
- Brownish Purple #76424E ΔE 0.054
- Chestnut #742802 ΔE 0.060
- Milk Chocolate #7F4E1E ΔE 0.072
- Red Brown #8B2E16 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.077
- Charcoal Grey #3C4142 ΔE 0.079
Use #673F31 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.