#644C23
Closest named color: Mud Brown (#60460F). oklch(43.3% 0.066 78.9), rgb(100, 76, 35).
Aa
White text reads best on this color (8.07:1).
About this color
#644C23 is a dark, muted brown. In OKLCH its lightness is 43%, its chroma 0.066 and its hue 79°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.024 away. White text reads best on it, at 8.07:1.
| Hue family | Browns |
| Lightness | dark (43%) |
| Chroma | muted (0.066) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.59:1 |
| White text | 8.07:1 |
Values
| HEX | #644C23 |
| RGB | rgb(100, 76, 35) |
| HSL | hsl(38, 48%, 26%) |
| OKLCH | oklch(43.3% 0.066 78.9) |
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 #644C23 | 8.07:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #644C23 | 2.59:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #644C23 text on white | 8.07:1 | AAA | Lc 87.9 | Fine for body text |
| #644C23 text on black | 2.59:1 | Fails | Lc -14.3 | 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
#F7F5F2
oklch(97.1% 0.005 78.3)
-
Step 100
100
#EEE9E2
oklch(93.6% 0.011 76.6)
-
Step 200
200
#E1D8CA
oklch(88.6% 0.021 79.1)
-
Step 300
300
#CEBEA5
oklch(80.8% 0.039 79)
-
Step 400
400
#B69D75
oklch(70.8% 0.062 79.2)
-
Step 500
500
#A38451
oklch(63.1% 0.078 79.1)
-
Step 600
600
#8E6D34
oklch(55.6% 0.085 79.1)
-
Step 700
700
#795B27
oklch(49.1% 0.079 78.8)
-
Step 800
800 (this color)
#644C23
oklch(43.3% 0.066 78.9)
-
Step 900
900
#503E20
oklch(37.6% 0.051 79)
-
Step 950
950
#2F2514
oklch(27.1% 0.032 80)
#644C23 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) | #564C1F | 0.026 |
| Deuteranopia (no green cones) | #5B5224 | 0.023 |
| Tritanopia (no blue cones) | #6D4543 | 0.058 |
| Achromatopsia (no color) | #505050 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644C23
#644C23
oklch(43.3% 0.066 78.9)
- #3A5175
#3A5175
oklch(43.3% 0.066 259.1)
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 #644C23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.024
- Olive Brown #645403 ΔE 0.038
- Green Brown #544E03 ΔE 0.042
- Milk Chocolate #7F4E1E ΔE 0.051
- Medium Brown #7F5112 ΔE 0.055
- Mud #735C12 ΔE 0.060
- Greeny Brown #696006 ΔE 0.069
- Army Green #4B5D16 ΔE 0.069
Use #644C23 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.