#673539
Closest named color: Purple Brown (#673A3F). oklch(39.4% 0.071 15.8), rgb(103, 53, 57).
Aa
White text reads best on this color (9.79:1).
About this color
#673539 is a dark, moderately saturated red. In OKLCH its lightness is 39%, its chroma 0.071 and its hue 16°. 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 9.79:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.071) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #673539 |
| RGB | rgb(103, 53, 57) |
| HSL | hsl(355, 32%, 31%) |
| OKLCH | oklch(39.4% 0.071 15.8) |
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 #673539 | 9.79:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #673539 | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #673539 text on white | 9.79:1 | AAA | Lc 92.4 | Preferred for body text |
| #673539 text on black | 2.14:1 | Fails | Lc -10.0 | 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
#FAF4F4
oklch(97.2% 0.006 17.3)
-
Step 100
100
#F4E6E6
oklch(93.6% 0.015 17.4)
-
Step 200
200
#ECD2D2
oklch(88.5% 0.029 17.7)
-
Step 300
300
#E1B3B5
oklch(80.8% 0.054 15.4)
-
Step 400
400
#D18B8E
oklch(70.8% 0.086 16.7)
-
Step 500
500
#C36C73
oklch(63.1% 0.111 15.6)
-
Step 600
600
#AE535B
oklch(55.7% 0.119 16.3)
-
Step 700
700
#95434B
oklch(49.1% 0.11 16)
-
Step 800
800
#79373E
oklch(42.6% 0.092 15.2)
-
Step 900
900 (this color)
#673539
oklch(39.4% 0.071 15.8)
-
Step 950
950
#3A1D1F
oklch(27.1% 0.045 16.1)
#673539 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) | #3F3E39 | 0.077 |
| Deuteranopia (no green cones) | #4B4738 | 0.071 |
| Tritanopia (no blue cones) | #6F2F37 | 0.020 |
| Achromatopsia (no color) | #444444 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673539
#673539
oklch(39.4% 0.071 15.8)
- #005152
#005152
oklch(39.4% 0.067 196.2)
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 #673539, 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 0.053
- Chestnut #742802 ΔE 0.060
- Reddy Brown #6E1005 ΔE 0.078
- Wine Red #7B0323 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.080
- Bordeaux #7B002C ΔE 0.081
- Charcoal Grey #3C4142 ΔE 0.082
Use #673539 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.