#673B37
Closest named color: Purple Brown (#673A3F). oklch(40.5% 0.063 25.8), rgb(103, 59, 55).
Aa
White text reads best on this color (9.30:1).
About this color
#673B37 is a dark, muted red. In OKLCH its lightness is 40%, its chroma 0.063 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.014 away. White text reads best on it, at 9.30:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | muted (0.063) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #673B37 |
| RGB | rgb(103, 59, 55) |
| HSL | hsl(5, 30%, 31%) |
| OKLCH | oklch(40.5% 0.063 25.8) |
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 #673B37 | 9.30:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #673B37 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #673B37 text on white | 9.30:1 | AAA | Lc 91.3 | Preferred for body text |
| #673B37 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F1E7E6
oklch(93.6% 0.011 24.3)
-
Step 200
200
#E6D4D2
oklch(88.4% 0.02 25.2)
-
Step 300
300
#D8B8B4
oklch(80.9% 0.037 26.4)
-
Step 400
400
#C3938E
oklch(70.7% 0.059 25.4)
-
Step 500
500
#B37872
oklch(63.2% 0.075 25.8)
-
Step 600
600
#9E605A
oklch(55.6% 0.082 26)
-
Step 700
700
#874F4A
oklch(49.1% 0.076 25.7)
-
Step 800
800 (this color)
#673B37
oklch(40.5% 0.063 25.8)
-
Step 900
900
#593734
oklch(37.7% 0.049 25.2)
-
Step 950
950
#34201E
oklch(26.8% 0.032 25.7)
#673B37 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) | #454237 | 0.065 |
| Deuteranopia (no green cones) | #4F4A36 | 0.060 |
| Tritanopia (no blue cones) | #6F353A | 0.023 |
| Achromatopsia (no color) | #474747 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673B37
#673B37
oklch(40.5% 0.063 25.8)
- #11535A
#11535A
oklch(40.6% 0.063 205.7)
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 #673B37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.014
- Brownish Purple #76424E ΔE 0.048
- Chestnut #742802 ΔE 0.060
- Mud Brown #60460F ΔE 0.067
- Red Brown #8B2E16 ΔE 0.077
- Charcoal Grey #3C4142 ΔE 0.078
- Rust Brown #8B3103 ΔE 0.081
- Milk Chocolate #7F4E1E ΔE 0.085
Use #673B37 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.