#645B2E
Closest named color: Mud (#735C12). oklch(46.9% 0.065 98.3), rgb(100, 91, 46).
Aa
White text reads best on this color (6.82:1).
About this color
#645B2E is a medium-dark, muted brown. In OKLCH its lightness is 47%, its chroma 0.065 and its hue 98°. Its hue sits on the warm side of the wheel. The nearest named color is Mud (#735C12), ΔE 0.033 away. White text reads best on it, at 6.82:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.065) |
| Temperature | warm |
| Nearest name | Mud (#735C12) |
| Black text | 3.07:1 |
| White text | 6.82:1 |
Values
| HEX | #645B2E |
| RGB | rgb(100, 91, 46) |
| HSL | hsl(50, 37%, 29%) |
| OKLCH | oklch(46.9% 0.065 98.3) |
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 #645B2E | 6.82:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #645B2E | 3.07:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #645B2E text on white | 6.82:1 | AA | Lc 83.5 | Fine for body text |
| #645B2E text on black | 3.07:1 | AA large text | Lc -18.4 | 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 700.
-
Step 50
50
#F6F5F2
oklch(97% 0.004 91.4)
-
Step 100
100
#EBEAE3
oklch(93.6% 0.009 100)
-
Step 200
200
#DCD9CD
oklch(88.4% 0.017 95.2)
-
Step 300
300
#C6C1AB
oklch(80.9% 0.031 96.5)
-
Step 400
400
#A8A17E
oklch(70.6% 0.049 98)
-
Step 500
500
#938A5D
oklch(63% 0.063 98.2)
-
Step 600
600
#7E7442
oklch(55.6% 0.07 98.3)
-
Step 700
700 (this color)
#645B2E
oklch(46.9% 0.065 98.3)
-
Step 800
800
#574F2C
oklch(42.7% 0.053 96.8)
-
Step 900
900
#474228
oklch(37.7% 0.041 98.7)
-
Step 950
950
#2A2717
oklch(27.1% 0.028 98.9)
#645B2E 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) | #63592A | 0.007 |
| Deuteranopia (no green cones) | #655C30 | 0.004 |
| Tritanopia (no blue cones) | #6B5550 | 0.059 |
| Achromatopsia (no color) | #5B5B5B | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B2E
#645B2E
oklch(46.9% 0.065 98.3)
- #52577F
#52577F
oklch(46.9% 0.065 278.1)
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 #645B2E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud #735C12 ΔE 0.033
- Olive Brown #645403 ΔE 0.033
- Greeny Brown #696006 ΔE 0.037
- Camo Green #526525 ΔE 0.044
- Dark Moss Green #606C38 ΔE 0.049
- Army Green #4B5D16 ΔE 0.051
- Medium Brown #7F5112 ΔE 0.051
- Dark Olive Green #556B2F ΔE 0.052
Use #645B2E 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.