#673F18
Closest named color: Mud Brown (#60460F). oklch(40.7% 0.077 61.7), rgb(103, 63, 24).
Aa
White text reads best on this color (9.12:1).
About this color
#673F18 is a dark, moderately saturated brown. In OKLCH its lightness is 41%, its chroma 0.077 and its hue 62°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.027 away. White text reads best on it, at 9.12:1.
| Hue family | Browns |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.077) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #673F18 |
| RGB | rgb(103, 63, 24) |
| HSL | hsl(30, 62%, 25%) |
| OKLCH | oklch(40.7% 0.077 61.7) |
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 #673F18 | 9.12:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #673F18 | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #673F18 text on white | 9.12:1 | AAA | Lc 90.8 | Preferred for body text |
| #673F18 text on black | 2.30:1 | Fails | Lc -11.5 | 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 800.
-
Step 50
50
#F9F5F1
oklch(97.2% 0.007 67.7)
-
Step 100
100
#F1E8E1
oklch(93.6% 0.014 60.6)
-
Step 200
200
#E6D6C9
oklch(88.6% 0.025 61.6)
-
Step 300
300
#D7BBA4
oklch(81% 0.045 61.5)
-
Step 400
400
#C29772
oklch(70.8% 0.072 62)
-
Step 500
500
#B27C4D
oklch(63.1% 0.092 61)
-
Step 600
600
#9D652F
oklch(55.7% 0.1 62.1)
-
Step 700
700
#865322
oklch(49.1% 0.093 61.3)
-
Step 800
800 (this color)
#673F18
oklch(40.7% 0.077 61.7)
-
Step 900
900
#583A1E
oklch(37.7% 0.06 62.4)
-
Step 950
950
#342212
oklch(27% 0.038 61.7)
#673F18 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) | #4B4313 | 0.055 |
| Deuteranopia (no green cones) | #554C18 | 0.049 |
| Tritanopia (no blue cones) | #713637 | 0.057 |
| Achromatopsia (no color) | #484848 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673F18
#673F18
oklch(40.7% 0.077 61.7)
- #1C4E6F
#1C4E6F
oklch(40.7% 0.077 241.3)
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 #673F18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.027
- Chestnut #742802 ΔE 0.055
- Purple Brown #673A3F ΔE 0.059
- Green Brown #544E03 ΔE 0.061
- Milk Chocolate #7F4E1E ΔE 0.065
- Olive Brown #645403 ΔE 0.066
- Medium Brown #7F5112 ΔE 0.072
- Rust Brown #8B3103 ΔE 0.073
Use #673F18 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.