#63571B
Closest named color: Olive Brown (#645403). oklch(45.6% 0.08 97.8), rgb(99, 87, 27).
Aa
White text reads best on this color (7.21:1).
About this color
#63571B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.080 and its hue 98°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.014 away. White text reads best on it, at 7.21:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.080) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.90:1 |
| White text | 7.21:1 |
Values
| HEX | #63571B |
| RGB | rgb(99, 87, 27) |
| HSL | hsl(50, 57%, 25%) |
| OKLCH | oklch(45.6% 0.08 97.8) |
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 #63571B | 7.21:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #63571B | 2.90:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #63571B text on white | 7.21:1 | AAA | Lc 85.0 | Fine for body text |
| #63571B text on black | 2.90:1 | Fails | Lc -17.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F6F5F1
oklch(97% 0.005 95.1)
-
Step 100
100
#ECEAE0
oklch(93.6% 0.013 97.4)
-
Step 200
200
#DDDAC7
oklch(88.6% 0.026 99.6)
-
Step 300
300
#C8C19F
oklch(80.8% 0.047 97.7)
-
Step 400
400
#ADA16B
oklch(70.6% 0.074 97.2)
-
Step 500
500
#998A41
oklch(63.1% 0.095 97.9)
-
Step 600
600
#84731D
oklch(55.6% 0.104 97.5)
-
Step 700
700
#70600E
oklch(49% 0.096 97)
-
Step 800
800 (this color)
#63571B
oklch(45.6% 0.08 97.8)
-
Step 900
900
#4A4216
oklch(37.7% 0.063 99)
-
Step 950
950
#2C270E
oklch(27.2% 0.041 98.2)
#63571B 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) | #605513 | 0.010 |
| Deuteranopia (no green cones) | #63591E | 0.006 |
| Tritanopia (no blue cones) | #6B504B | 0.074 |
| Achromatopsia (no color) | #575757 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63571B
#63571B
oklch(45.6% 0.08 97.8)
- #4C5283
#4C5283
oklch(45.6% 0.08 277.4)
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 #63571B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.014
- Mud #735C12 ΔE 0.033
- Greeny Brown #696006 ΔE 0.034
- Green Brown #544E03 ΔE 0.041
- Army Green #4B5D16 ΔE 0.043
- Camo Green #526525 ΔE 0.045
- Camouflage Green #4B6113 ΔE 0.049
- Mud Brown #60460F ΔE 0.049
Use #63571B 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.