#643B23
Closest named color: Purple Brown (#673A3F). oklch(39.6% 0.069 50.1), rgb(100, 59, 35).
Aa
White text reads best on this color (9.58:1).
About this color
#643B23 is a dark, muted brown. In OKLCH its lightness is 40%, its chroma 0.069 and its hue 50°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.043 away. White text reads best on it, at 9.58:1.
| Hue family | Browns |
| Lightness | dark (40%) |
| Chroma | muted (0.069) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #643B23 |
| RGB | rgb(100, 59, 35) |
| HSL | hsl(22, 48%, 26%) |
| OKLCH | oklch(39.6% 0.069 50.1) |
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 #643B23 | 9.58:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #643B23 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #643B23 text on white | 9.58:1 | AAA | Lc 92.0 | Preferred for body text |
| #643B23 text on black | 2.19:1 | Fails | Lc -10.4 | 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
#F9F4F1
oklch(97% 0.007 53.4)
-
Step 100
100
#F3E7E1
oklch(93.6% 0.015 48.6)
-
Step 200
200
#EAD4C9
oklch(88.5% 0.029 48.4)
-
Step 300
300
#DDB8A3
oklch(81% 0.052 51.3)
-
Step 400
400
#CB9272
oklch(70.8% 0.082 50.3)
-
Step 500
500
#BC764D
oklch(63.2% 0.104 50.3)
-
Step 600
600
#A75D2F
oklch(55.6% 0.114 50.3)
-
Step 700
700
#8F4C22
oklch(49% 0.106 50)
-
Step 800
800
#753F1E
oklch(42.8% 0.088 49.9)
-
Step 900
900 (this color)
#643B23
oklch(39.6% 0.069 50.1)
-
Step 950
950
#372012
oklch(27% 0.043 51.4)
#643B23 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) | #464021 | 0.058 |
| Deuteranopia (no green cones) | #504923 | 0.053 |
| Tritanopia (no blue cones) | #6D3335 | 0.042 |
| Achromatopsia (no color) | #454545 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #643B23
#643B23
oklch(39.6% 0.069 50.1)
- #154D64
#154D64
oklch(39.6% 0.068 229.9)
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 #643B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.043
- Mud Brown #60460F ΔE 0.043
- Chestnut #742802 ΔE 0.050
- Brownish Purple #76424E ΔE 0.073
- Green Brown #544E03 ΔE 0.075
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.079
- Charcoal Grey #3C4142 ΔE 0.079
Use #643B23 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.