#645A19
Closest named color: Olive Brown (#645403). oklch(46.4% 0.084 100.3), rgb(100, 90, 25).
Aa
White text reads best on this color (6.95:1).
About this color
#645A19 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 46%, its chroma 0.084 and its hue 100°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.018 away. White text reads best on it, at 6.95:1.
| Hue family | Browns |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.084) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 3.01:1 |
| White text | 6.95:1 |
Values
| HEX | #645A19 |
| RGB | rgb(100, 90, 25) |
| HSL | hsl(52, 60%, 25%) |
| OKLCH | oklch(46.4% 0.084 100.3) |
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 #645A19 | 6.95:1 | AA | Lc -89.0 | Fine for body text |
| Black text on #645A19 | 3.01:1 | AA large text | Lc 20.0 | Dividers and decoration only |
| #645A19 text on white | 6.95:1 | AA | Lc 84.0 | Fine for body text |
| #645A19 text on black | 3.01:1 | AA large text | Lc -18.0 | 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
#DCDAC9
oklch(88.5% 0.023 101.4)
-
Step 300
300
#C6C2A4
oklch(80.9% 0.041 101)
-
Step 400
400
#A9A273
oklch(70.6% 0.065 100.7)
-
Step 500
500
#958B4D
oklch(63.1% 0.084 100.3)
-
Step 600
600
#7F7430
oklch(55.5% 0.089 100.2)
-
Step 700
700 (this color)
#645A19
oklch(46.4% 0.084 100.3)
-
Step 800
800
#58501E
oklch(42.8% 0.07 100.3)
-
Step 900
900
#48421E
oklch(37.6% 0.054 100)
-
Step 950
950
#2A2712
oklch(27% 0.035 101.2)
#645A19 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) | #63570F | 0.010 |
| Deuteranopia (no green cones) | #665B1D | 0.006 |
| Tritanopia (no blue cones) | #6C534D | 0.077 |
| Achromatopsia (no color) | #595959 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645A19
#645A19
oklch(46.4% 0.084 100.3)
- #505387
#505387
oklch(46.3% 0.084 280.1)
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 #645A19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.018
- Greeny Brown #696006 ΔE 0.024
- Mud #735C12 ΔE 0.027
- Camo Green #526525 ΔE 0.039
- Army Green #4B5D16 ΔE 0.041
- Mud Green #606602 ΔE 0.041
- Camouflage Green #4B6113 ΔE 0.044
- Green Brown #544E03 ΔE 0.048
Use #645A19 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.