#581C03
Closest named color: Reddy Brown (#6E1005). oklch(31.8% 0.095 40.3), rgb(88, 28, 3).
Aa
White text reads best on this color (13.27:1).
About this color
#581C03 is a dark, moderately saturated brown. In OKLCH its lightness is 32%, its chroma 0.095 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.049 away. White text reads best on it, at 13.27:1.
| Hue family | Browns |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.095) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.58:1 |
| White text | 13.27:1 |
Values
| HEX | #581C03 |
| RGB | rgb(88, 28, 3) |
| HSL | hsl(18, 93%, 18%) |
| OKLCH | oklch(31.8% 0.095 40.3) |
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 #581C03 | 13.27:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #581C03 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #581C03 text on white | 13.27:1 | AAA | Lc 99.0 | Preferred for body text |
| #581C03 text on black | 1.58:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#FFF2EE
oklch(97% 0.015 37.9)
-
Step 100
100
#FEE3DA
oklch(93.5% 0.032 39.3)
-
Step 200
200
#FFCCBA
oklch(88.5% 0.063 40.3)
-
Step 300
300
#FFA788
oklch(80.8% 0.113 40.2)
-
Step 400
400
#FA723D
oklch(70.7% 0.18 40.6)
-
Step 500
500
#E65100
oklch(63.1% 0.197 40.3)
-
Step 600
600
#C24300
oklch(55.5% 0.173 40.3)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800
#882C00
oklch(42.7% 0.134 40.1)
-
Step 900
900
#722400
oklch(37.7% 0.117 40.3)
-
Step 950
950 (this color)
#581C03
oklch(31.8% 0.095 40.3)
#581C03 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) | #2E2700 | 0.093 |
| Deuteranopia (no green cones) | #3C3501 | 0.086 |
| Tritanopia (no blue cones) | #620B17 | 0.043 |
| Achromatopsia (no color) | #303030 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #581C03
#581C03
oklch(31.8% 0.095 40.3)
- #003947
#003947
oklch(31.9% 0.058 220.3)
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 #581C03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.049
- Chocolate Brown #411900 ΔE 0.055
- Claret #680018 ΔE 0.056
- Mahogany #4A0100 ΔE 0.063
- Burgundy #610023 ΔE 0.066
- Blood #770001 ΔE 0.069
- Chestnut #742802 ΔE 0.072
- Deep Brown #410200 ΔE 0.081
Use #581C03 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.