#673B40
Closest named color: Purple Brown (#673A3F). oklch(40.7% 0.062 12.9), rgb(103, 59, 64).
Aa
White text reads best on this color (9.22:1).
About this color
#673B40 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.062 and its hue 13°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.003 away. White text reads best on it, at 9.22:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.062) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #673B40 |
| RGB | rgb(103, 59, 64) |
| HSL | hsl(353, 27%, 32%) |
| OKLCH | oklch(40.7% 0.062 12.9) |
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 #673B40 | 9.22:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #673B40 | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #673B40 text on white | 9.22:1 | AAA | Lc 91.1 | Preferred for body text |
| #673B40 text on black | 2.27:1 | Fails | Lc -11.3 | 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
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F1E7E8
oklch(93.6% 0.011 10.3)
-
Step 200
200
#E6D4D5
oklch(88.5% 0.02 13.7)
-
Step 300
300
#D7B8BA
oklch(81% 0.036 13.5)
-
Step 400
400
#C29296
oklch(70.7% 0.058 13.1)
-
Step 500
500
#B2777D
oklch(63.2% 0.075 12.7)
-
Step 600
600
#9D5F66
oklch(55.6% 0.081 12.7)
-
Step 700
700
#864E54
oklch(49.1% 0.076 13.3)
-
Step 800
800 (this color)
#673B40
oklch(40.7% 0.062 12.9)
-
Step 900
900
#58373A
oklch(37.7% 0.047 13.6)
-
Step 950
950
#342022
oklch(27% 0.031 12.8)
#673B40 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) | #434240 | 0.067 |
| Deuteranopia (no green cones) | #4E4B3F | 0.063 |
| Tritanopia (no blue cones) | #6F373D | 0.017 |
| Achromatopsia (no color) | #474747 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #673B40
#673B40
oklch(40.7% 0.062 12.9)
- #135453
#135453
oklch(40.7% 0.062 193.4)
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 #673B40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.003
- Brownish Purple #76424E ΔE 0.041
- Chestnut #742802 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.078
- Mud Brown #60460F ΔE 0.080
- Red Brown #8B2E16 ΔE 0.083
- Rust Brown #8B3103 ΔE 0.089
- Dark Mauve #874C62 ΔE 0.091
Use #673B40 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.