#6B403F
Closest named color: Purple Brown (#673A3F). oklch(42.2% 0.06 21.4), rgb(107, 64, 63).
Aa
White text reads best on this color (8.64:1).
About this color
#6B403F is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.060 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.020 away. White text reads best on it, at 8.64:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.060) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.43:1 |
| White text | 8.64:1 |
Values
| HEX | #6B403F |
| RGB | rgb(107, 64, 63) |
| HSL | hsl(1, 26%, 33%) |
| OKLCH | oklch(42.2% 0.06 21.4) |
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 #6B403F | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #6B403F | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #6B403F text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #6B403F text on black | 2.43:1 | Fails | Lc -12.7 | 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 800.
-
Step 50
50
#F9F4F4
oklch(97.1% 0.005 17.2)
-
Step 100
100
#F1E7E7
oklch(93.6% 0.011 17.4)
-
Step 200
200
#E6D4D3
oklch(88.4% 0.02 21.4)
-
Step 300
300
#D7B8B7
oklch(80.9% 0.036 20.1)
-
Step 400
400
#C29391
oklch(70.7% 0.057 21.4)
-
Step 500
500
#B17876
oklch(63.1% 0.072 21.5)
-
Step 600
600
#9C605F
oklch(55.5% 0.079 20.9)
-
Step 700
700
#854F4E
oklch(49% 0.073 21.2)
-
Step 800
800 (this color)
#6B403F
oklch(42.2% 0.06 21.4)
-
Step 900
900
#583736
oklch(37.6% 0.048 21.5)
-
Step 950
950
#342120
oklch(27.1% 0.03 22.6)
#6B403F 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) | #49463F | 0.063 |
| Deuteranopia (no green cones) | #534F3E | 0.060 |
| Tritanopia (no blue cones) | #733B40 | 0.020 |
| Achromatopsia (no color) | #4C4C4C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6B403F
#6B403F
oklch(42.2% 0.06 21.4)
- #1B575B
#1B575B
oklch(42.1% 0.06 201.4)
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 #6B403F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.020
- Brownish Purple #76424E ΔE 0.032
- Mud Brown #60460F ΔE 0.071
- Chestnut #742802 ΔE 0.072
- Red Brown #8B2E16 ΔE 0.076
- Milk Chocolate #7F4E1E ΔE 0.077
- Rust Brown #8B3103 ΔE 0.080
- Dark Mauve #874C62 ΔE 0.081
Use #6B403F 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.