#573B40
Closest named color: Purple Brown (#673A3F). oklch(38.6% 0.04 7.3), rgb(87, 59, 64).
Aa
White text reads best on this color (9.97:1).
About this color
#573B40 is a dark, muted red. In OKLCH its lightness is 39%, its chroma 0.040 and its hue 7°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.031 away. White text reads best on it, at 9.97:1.
| Hue family | Reds |
| Lightness | dark (39%) |
| Chroma | muted (0.040) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #573B40 |
| RGB | rgb(87, 59, 64) |
| HSL | hsl(349, 19%, 29%) |
| OKLCH | oklch(38.6% 0.04 7.3) |
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 #573B40 | 9.97:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #573B40 | 2.10:1 | Fails | Lc 10.8 | Not readable |
| #573B40 text on white | 9.97:1 | AAA | Lc 93.1 | Preferred for body text |
| #573B40 text on black | 2.10:1 | Fails | Lc -9.4 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#EFE7E9
oklch(93.5% 0.009 0.1)
-
Step 200
200
#E4D5D7
oklch(88.6% 0.017 8.2)
-
Step 300
300
#D3B9BD
oklch(80.9% 0.03 7.3)
-
Step 400
400
#BC959B
oklch(70.8% 0.047 8)
-
Step 500
500
#AB7A83
oklch(63.1% 0.062 6.9)
-
Step 600
600
#96636C
oklch(55.7% 0.067 7.9)
-
Step 700
700
#7F525A
oklch(49.1% 0.061 7.9)
-
Step 800
800
#68434A
oklch(42.7% 0.052 7.1)
-
Step 900
900 (this color)
#573B40
oklch(38.6% 0.04 7.3)
-
Step 950
950
#322124
oklch(27% 0.027 7.3)
#573B40 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) | #3F3F40 | 0.044 |
| Deuteranopia (no green cones) | #46443F | 0.040 |
| Tritanopia (no blue cones) | #5C393D | 0.011 |
| Achromatopsia (no color) | #424242 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B40
#573B40
oklch(38.6% 0.04 7.3)
- #294B48
#294B48
oklch(38.6% 0.04 188.4)
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 #573B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.049
- Onyx #343A40 ΔE 0.063
- Brownish Purple #76424E ΔE 0.068
- Dark Slate Gray #2F4F4F ΔE 0.080
- Charcoal #264653 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.081
- Mud Brown #60460F ΔE 0.081
Use #573B40 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.