#645B24
Closest named color: Olive Brown (#645403). oklch(46.8% 0.075 100.1), rgb(100, 91, 36).
Aa
White text reads best on this color (6.85:1).
About this color
#645B24 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.075 and its hue 100°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.025 away. White text reads best on it, at 6.85:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.075) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #645B24 |
| RGB | rgb(100, 91, 36) |
| HSL | hsl(52, 47%, 27%) |
| OKLCH | oklch(46.8% 0.075 100.1) |
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 #645B24 | 6.85:1 | AA | Lc -88.6 | Fine for body text |
| Black text on #645B24 | 3.06:1 | AA large text | Lc 20.4 | Dividers and decoration only |
| #645B24 text on white | 6.85:1 | AA | Lc 83.6 | Fine for body text |
| #645B24 text on black | 3.06:1 | AA large text | Lc -18.3 | 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
#EBEAE2
oklch(93.6% 0.011 100.8)
-
Step 200
200
#DCDACB
oklch(88.6% 0.02 100.6)
-
Step 300
300
#C6C2A7
oklch(81% 0.037 100.2)
-
Step 400
400
#A9A278
oklch(70.7% 0.058 99.7)
-
Step 500
500
#948B54
oklch(63.2% 0.075 100.1)
-
Step 600
600
#7E7439
oklch(55.5% 0.08 99.9)
-
Step 700
700 (this color)
#645B24
oklch(46.8% 0.075 100.1)
-
Step 800
800
#575025
oklch(42.8% 0.062 100.2)
-
Step 900
900
#474223
oklch(37.6% 0.048 100.3)
-
Step 950
950
#2A2715
oklch(27.1% 0.031 100)
#645B24 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) | #63581E | 0.009 |
| Deuteranopia (no green cones) | #665C27 | 0.005 |
| Tritanopia (no blue cones) | #6C554F | 0.069 |
| Achromatopsia (no color) | #5A5A5A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B24
#645B24
oklch(46.8% 0.075 100.1)
- #525584
#525584
oklch(46.8% 0.076 280.2)
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 #645B24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.025
- Mud #735C12 ΔE 0.028
- Greeny Brown #696006 ΔE 0.028
- Camo Green #526525 ΔE 0.039
- Army Green #4B5D16 ΔE 0.044
- Mud Green #606602 ΔE 0.045
- Camouflage Green #4B6113 ΔE 0.048
- Dark Moss Green #606C38 ΔE 0.048
Use #645B24 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.