#673521
Closest named color: Chestnut (#742802). oklch(38.9% 0.078 42), rgb(103, 53, 33).
Aa
White text reads best on this color (9.96:1).
About this color
#673521 is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.078 and its hue 42°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.037 away. White text reads best on it, at 9.96:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.078) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #673521 |
| RGB | rgb(103, 53, 33) |
| HSL | hsl(17, 51%, 27%) |
| OKLCH | oklch(38.9% 0.078 42) |
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 #673521 | 9.96:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #673521 | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #673521 text on white | 9.96:1 | AAA | Lc 92.8 | Preferred for body text |
| #673521 text on black | 2.10:1 | Fails | Lc -9.7 | 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
#FAF4F1
oklch(97.1% 0.008 48.7)
-
Step 100
100
#F4E6E1
oklch(93.5% 0.017 40.8)
-
Step 200
200
#EDD3C9
oklch(88.6% 0.032 42.2)
-
Step 300
300
#E3B5A3
oklch(81% 0.059 42.4)
-
Step 400
400
#D38D72
oklch(70.8% 0.094 41.9)
-
Step 500
500
#C56F4C
oklch(63.1% 0.12 42.4)
-
Step 600
600
#B1552F
oklch(55.7% 0.131 41.9)
-
Step 700
700
#984522
oklch(49.2% 0.121 41.9)
-
Step 800
800
#7B391E
oklch(42.7% 0.1 41.8)
-
Step 900
900 (this color)
#673521
oklch(38.9% 0.078 42)
-
Step 950
950
#3A1E12
oklch(27% 0.049 43.5)
#673521 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) | #423C1F | 0.073 |
| Deuteranopia (no green cones) | #4E4720 | 0.068 |
| Tritanopia (no blue cones) | #712C30 | 0.040 |
| Achromatopsia (no color) | #434343 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673521
#673521
oklch(38.9% 0.078 42)
- #004D60
#004D60
oklch(38.9% 0.072 221.6)
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 #673521, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.037
- Purple Brown #673A3F ΔE 0.041
- Mud Brown #60460F ΔE 0.057
- Reddy Brown #6E1005 ΔE 0.068
- Red Brown #8B2E16 ΔE 0.072
- Rust Brown #8B3103 ΔE 0.074
- Brownish Purple #76424E ΔE 0.074
- Blood #770001 ΔE 0.079
Use #673521 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.