#573F03
Closest named color: Mud Brown (#60460F). oklch(38.4% 0.077 83.5), rgb(87, 63, 3).
Aa
White text reads best on this color (9.91:1).
About this color
#573F03 is a dark, moderately saturated brown. In OKLCH its lightness is 38%, its chroma 0.077 and its hue 83°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.028 away. White text reads best on it, at 9.91:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.11:1 |
| White text | 9.91:1 |
Values
| HEX | #573F03 |
| RGB | rgb(87, 63, 3) |
| HSL | hsl(43, 93%, 18%) |
| OKLCH | oklch(38.4% 0.077 83.5) |
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 #573F03 | 9.91:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #573F03 | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #573F03 text on white | 9.91:1 | AAA | Lc 92.8 | Preferred for body text |
| #573F03 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#F8F5F0
oklch(97.1% 0.007 80.7)
-
Step 100
100
#EFE9DE
oklch(93.6% 0.016 82.8)
-
Step 200
200
#E3D8C2
oklch(88.5% 0.032 84.6)
-
Step 300
300
#D3BE96
oklch(80.9% 0.059 83.4)
-
Step 400
400
#BC9C5A
oklch(70.7% 0.093 84.2)
-
Step 500
500
#AC8222
oklch(63.1% 0.118 83.1)
-
Step 600
600
#936C00
oklch(55.6% 0.114 83.5)
-
Step 700
700
#7C5A00
oklch(49% 0.101 82.9)
-
Step 800
800
#664A00
oklch(42.8% 0.088 83.6)
-
Step 900
900 (this color)
#573F03
oklch(38.4% 0.077 83.5)
-
Step 950
950
#322406
oklch(27% 0.049 83)
#573F03 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) | #493F00 | 0.027 |
| Deuteranopia (no green cones) | #4F4506 | 0.022 |
| Tritanopia (no blue cones) | #5F3835 | 0.068 |
| Achromatopsia (no color) | #434343 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F03
#573F03
oklch(38.4% 0.077 83.5)
- #2E426D
#2E426D
oklch(38.4% 0.078 264.2)
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 #573F03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.028
- Green Brown #544E03 ΔE 0.045
- Dark Olive #373E02 ΔE 0.059
- Olive Brown #645403 ΔE 0.069
- Chestnut #742802 ΔE 0.078
- Navy Green #35530A ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.083
- Purple Brown #673A3F ΔE 0.085
Use #573F03 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.