#573F37
Closest named color: Purple Brown (#673A3F). oklch(39.2% 0.036 39.2), rgb(87, 63, 55).
Aa
White text reads best on this color (9.67:1).
About this color
#573F37 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.036 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.037 away. White text reads best on it, at 9.67:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.036) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #573F37 |
| RGB | rgb(87, 63, 55) |
| HSL | hsl(15, 23%, 28%) |
| OKLCH | oklch(39.2% 0.036 39.2) |
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 #573F37 | 9.67:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #573F37 | 2.17:1 | Fails | Lc 11.6 | Not readable |
| #573F37 text on white | 9.67:1 | AAA | Lc 92.4 | Preferred for body text |
| #573F37 text on black | 2.17:1 | Fails | Lc -10.1 | 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 900.
-
Step 50
50
#F8F5F4
oklch(97.2% 0.003 39.5)
-
Step 100
100
#EFE8E6
oklch(93.6% 0.008 36.6)
-
Step 200
200
#E3D6D2
oklch(88.5% 0.015 37.9)
-
Step 300
300
#D1BBB4
oklch(80.9% 0.027 38.4)
-
Step 400
400
#BA988D
oklch(70.8% 0.044 38.7)
-
Step 500
500
#A87E70
oklch(63% 0.057 39.2)
-
Step 600
600
#936759
oklch(55.6% 0.061 38.4)
-
Step 700
700
#7D5649
oklch(49.2% 0.056 39.2)
-
Step 800
800
#66463C
oklch(42.7% 0.047 38.1)
-
Step 900
900 (this color)
#573F37
oklch(39.2% 0.036 39.2)
-
Step 950
950
#31231E
oklch(27.1% 0.023 40.5)
#573F37 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) | #454236 | 0.033 |
| Deuteranopia (no green cones) | #4A4637 | 0.030 |
| Tritanopia (no blue cones) | #5D3B3D | 0.021 |
| Achromatopsia (no color) | #444444 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F37
#573F37
oklch(39.2% 0.036 39.2)
- #2F4A53
#2F4A53
oklch(39.1% 0.036 220.9)
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 #573F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.048
- Mud Brown #60460F ΔE 0.059
- Onyx #343A40 ΔE 0.067
- Brownish Purple #76424E ΔE 0.072
- Dark Slate Gray #2F4F4F ΔE 0.073
- Chestnut #742802 ΔE 0.079
- Charcoal #264653 ΔE 0.082
Use #573F37 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.