#645038
Closest named color: Mud Brown (#60460F). oklch(44.5% 0.045 71.3), rgb(100, 80, 56).
Aa
White text reads best on this color (7.64:1).
About this color
#645038 is a dark, muted brown. In OKLCH its lightness is 45%, its chroma 0.045 and its hue 71°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Brown (#60460F), ΔE 0.047 away. White text reads best on it, at 7.64:1.
| Hue family | Browns |
| Lightness | dark (45%) |
| Chroma | muted (0.045) |
| Temperature | warm |
| Nearest name | Mud Brown (#60460F) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #645038 |
| RGB | rgb(100, 80, 56) |
| HSL | hsl(33, 28%, 31%) |
| OKLCH | oklch(44.5% 0.045 71.3) |
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 #645038 | 7.64:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #645038 | 2.74:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #645038 text on white | 7.64:1 | AAA | Lc 86.5 | Fine for body text |
| #645038 text on black | 2.74:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#F7F5F3
oklch(97.1% 0.003 67.8)
-
Step 100
100
#EDE9E4
oklch(93.6% 0.008 73.7)
-
Step 200
200
#DFD8CF
oklch(88.5% 0.014 74.4)
-
Step 300
300
#CCBEAF
oklch(80.9% 0.026 69.4)
-
Step 400
400
#B29D84
oklch(70.8% 0.043 71.9)
-
Step 500
500
#9E8466
oklch(63% 0.053 70.6)
-
Step 600
600
#896E4D
oklch(55.6% 0.058 71.8)
-
Step 700
700
#745C3E
oklch(49.1% 0.054 72.2)
-
Step 800
800 (this color)
#645038
oklch(44.5% 0.045 71.3)
-
Step 900
900
#4E3F2D
oklch(37.8% 0.035 71.5)
-
Step 950
950
#2D251A
oklch(27% 0.023 75.4)
#645038 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) | #575136 | 0.023 |
| Deuteranopia (no green cones) | #5C5539 | 0.019 |
| Tritanopia (no blue cones) | #6B4B4A | 0.038 |
| Achromatopsia (no color) | #535353 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645038
#645038
oklch(44.5% 0.045 71.3)
- #41566D
#41566D
oklch(44.5% 0.046 251.1)
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 #645038, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Brown #60460F ΔE 0.047
- Milk Chocolate #7F4E1E ΔE 0.053
- Olive Brown #645403 ΔE 0.053
- Medium Brown #7F5112 ΔE 0.059
- Green Brown #544E03 ΔE 0.062
- Mud #735C12 ΔE 0.064
- Brownish Purple #76424E ΔE 0.068
- Purple Brown #673A3F ΔE 0.069
Use #645038 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.