#645D19
Closest named color: Greeny Brown (#696006). oklch(47.1% 0.087 103.4), rgb(100, 93, 25).
Aa
White text reads best on this color (6.72:1).
About this color
#645D19 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.087 and its hue 103°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.017 away. White text reads best on it, at 6.72:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.087) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #645D19 |
| RGB | rgb(100, 93, 25) |
| HSL | hsl(54, 60%, 25%) |
| OKLCH | oklch(47.1% 0.087 103.4) |
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 #645D19 | 6.72:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #645D19 | 3.12:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #645D19 text on white | 6.72:1 | AA | Lc 83.1 | Fine for body text |
| #645D19 text on black | 3.12:1 | AA large text | Lc -18.8 | 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
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EBEAE1
oklch(93.5% 0.012 101.5)
-
Step 200
200
#DBDAC9
oklch(88.5% 0.023 104.1)
-
Step 300
300
#C5C2A3
oklch(80.8% 0.042 102.7)
-
Step 400
400
#A8A372
oklch(70.8% 0.067 103)
-
Step 500
500
#938C4C
oklch(63.2% 0.086 103)
-
Step 600
600
#7D762D
oklch(55.7% 0.094 103.8)
-
Step 700
700 (this color)
#645D19
oklch(47.1% 0.087 103.4)
-
Step 800
800
#56511C
oklch(42.8% 0.073 103.9)
-
Step 900
900
#47431D
oklch(37.7% 0.056 103.3)
-
Step 950
950
#292712
oklch(26.9% 0.035 103.7)
#645D19 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) | #665A0E | 0.009 |
| Deuteranopia (no green cones) | #685D1D | 0.008 |
| Tritanopia (no blue cones) | #6C5650 | 0.080 |
| Achromatopsia (no color) | #5C5C5C | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645D19
#645D19
oklch(47.1% 0.087 103.4)
- #55548A
#55548A
oklch(47.1% 0.086 283.4)
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 #645D19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.017
- Mud #735C12 ΔE 0.025
- Olive Brown #645403 ΔE 0.026
- Camo Green #526525 ΔE 0.033
- Mud Green #606602 ΔE 0.033
- Army Green #4B5D16 ΔE 0.040
- Camouflage Green #4B6113 ΔE 0.041
- Dark Olive Green #556B2F ΔE 0.043
Use #645D19 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.