#64381F
Closest named color: Chestnut (#742802). oklch(39% 0.073 49), rgb(100, 56, 31).
Aa
White text reads best on this color (9.87:1).
About this color
#64381F is a dark, moderately saturated brown. In OKLCH its lightness is 39%, its chroma 0.073 and its hue 49°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.044 away. White text reads best on it, at 9.87:1.
| Hue family | Browns |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.073) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.12:1 |
| White text | 9.87:1 |
Values
| HEX | #64381F |
| RGB | rgb(100, 56, 31) |
| HSL | hsl(22, 53%, 26%) |
| OKLCH | oklch(39% 0.073 49) |
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 #64381F | 9.87:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #64381F | 2.12:1 | Fails | Lc 11.3 | Not readable |
| #64381F text on white | 9.87:1 | AAA | Lc 92.6 | Preferred for body text |
| #64381F text on black | 2.12:1 | Fails | Lc -9.8 | 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
#F3E7E1
oklch(93.6% 0.015 48.6)
-
Step 200
200
#EBD4C8
oklch(88.6% 0.03 49.4)
-
Step 300
300
#DFB7A2
oklch(80.9% 0.055 49.2)
-
Step 400
400
#CE906F
oklch(70.7% 0.088 48.9)
-
Step 500
500
#C07349
oklch(63.1% 0.113 48.4)
-
Step 600
600
#AB5A2A
oklch(55.5% 0.122 48.6)
-
Step 700
700
#924A1C
oklch(49.1% 0.113 49.5)
-
Step 800
800
#773D1A
oklch(42.7% 0.094 49)
-
Step 900
900 (this color)
#64381F
oklch(39% 0.073 49)
-
Step 950
950
#391F11
oklch(27% 0.047 48.2)
#64381F 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) | #443D1D | 0.063 |
| Deuteranopia (no green cones) | #4F471F | 0.057 |
| Tritanopia (no blue cones) | #6E2F32 | 0.045 |
| Achromatopsia (no color) | #434343 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #64381F
#64381F
oklch(39% 0.073 49)
- #094C64
#094C64
oklch(39% 0.073 228.9)
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 #64381F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.044
- Purple Brown #673A3F ΔE 0.046
- Mud Brown #60460F ΔE 0.048
- Reddy Brown #6E1005 ΔE 0.076
- Brownish Purple #76424E ΔE 0.078
- Rust Brown #8B3103 ΔE 0.078
- Red Brown #8B2E16 ΔE 0.078
- Green Brown #544E03 ΔE 0.080
Use #64381F 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.