#673B1F
Closest named color: Mud Brown (#60460F). oklch(40% 0.075 51.6), rgb(103, 59, 31).
Aa
White text reads best on this color (9.45:1).
About this color
#673B1F is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 52°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.041 away. White text reads best on it, at 9.45:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #673B1F |
| RGB | rgb(103, 59, 31) |
| HSL | hsl(23, 54%, 26%) |
| OKLCH | oklch(40% 0.075 51.6) |
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 #673B1F | 9.45:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #673B1F | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #673B1F text on white | 9.45:1 | AAA | Lc 91.6 | Preferred for body text |
| #673B1F text on black | 2.22:1 | Fails | Lc -10.8 | 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 900.
-
Step 50
50
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F3E7E0
oklch(93.6% 0.016 52.6)
-
Step 200
200
#EBD4C7
oklch(88.5% 0.031 51.5)
-
Step 300
300
#DFB7A0
oklch(80.9% 0.056 51.5)
-
Step 400
400
#CE916C
oklch(70.8% 0.09 52)
-
Step 500
500
#BF7444
oklch(63.1% 0.114 51.9)
-
Step 600
600
#AB5B23
oklch(55.6% 0.124 51.7)
-
Step 700
700
#924A15
oklch(49% 0.115 51.6)
-
Step 800
800
#773D15
oklch(42.6% 0.096 51.3)
-
Step 900
900 (this color)
#673B1F
oklch(40% 0.075 51.6)
-
Step 950
950
#391F0F
oklch(27% 0.048 51.1)
#673B1F 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) | #47401C | 0.062 |
| Deuteranopia (no green cones) | #524A1F | 0.056 |
| Tritanopia (no blue cones) | #713235 | 0.048 |
| Achromatopsia (no color) | #464646 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673B1F
#673B1F
oklch(40% 0.075 51.6)
- #0F4E69
#0F4E69
oklch(40% 0.075 232.3)
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 #673B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.041
- Chestnut #742802 ΔE 0.046
- Purple Brown #673A3F ΔE 0.047
- Rust Brown #8B3103 ΔE 0.072
- Red Brown #8B2E16 ΔE 0.073
- Brownish Purple #76424E ΔE 0.073
- Milk Chocolate #7F4E1E ΔE 0.074
- Green Brown #544E03 ΔE 0.074
Use #673B1F 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.