#673D21
Closest named color: Mud Brown (#60460F). oklch(40.4% 0.072 53), rgb(103, 61, 33).
Aa
White text reads best on this color (9.26:1).
About this color
#673D21 is a dark, moderately saturated brown. In OKLCH its lightness is 40%, its chroma 0.072 and its hue 53°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.038 away. White text reads best on it, at 9.26:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.072) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #673D21 |
| RGB | rgb(103, 61, 33) |
| HSL | hsl(24, 51%, 27%) |
| OKLCH | oklch(40.4% 0.072 53) |
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 #673D21 | 9.26:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #673D21 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #673D21 text on white | 9.26:1 | AAA | Lc 91.2 | Preferred for body text |
| #673D21 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F9F4F2
oklch(97% 0.006 43.3)
-
Step 100
100
#F1E8E2
oklch(93.6% 0.013 56.2)
-
Step 200
200
#E6D5CB
oklch(88.4% 0.023 52.7)
-
Step 300
300
#D7BAA8
oklch(80.9% 0.042 53.8)
-
Step 400
400
#C39579
oklch(70.6% 0.068 52.6)
-
Step 500
500
#B37B57
oklch(63.2% 0.086 53.3)
-
Step 600
600
#9E633C
oklch(55.6% 0.094 53.1)
-
Step 700
700
#87522E
oklch(49.2% 0.087 53.4)
-
Step 800
800 (this color)
#673D21
oklch(40.4% 0.072 53)
-
Step 900
900
#593924
oklch(37.7% 0.056 53.5)
-
Step 950
950
#342216
oklch(27.1% 0.035 54.4)
#673D21 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) | #49421E | 0.058 |
| Deuteranopia (no green cones) | #534B21 | 0.053 |
| Tritanopia (no blue cones) | #713536 | 0.046 |
| Achromatopsia (no color) | #474747 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673D21
#673D21
oklch(40.4% 0.072 53)
- #164F69
#164F69
oklch(40.4% 0.072 232.6)
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 #673D21, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.038
- Purple Brown #673A3F ΔE 0.047
- Chestnut #742802 ΔE 0.050
- Milk Chocolate #7F4E1E ΔE 0.070
- Green Brown #544E03 ΔE 0.071
- Brownish Purple #76424E ΔE 0.071
- Rust Brown #8B3103 ΔE 0.072
- Red Brown #8B2E16 ΔE 0.074
Use #673D21 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.