#645C16
Closest named color: Greeny Brown (#696006). oklch(46.9% 0.088 102.6), rgb(100, 92, 22).
Aa
White text reads best on this color (6.80:1).
About this color
#645C16 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.088 and its hue 103°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.018 away. White text reads best on it, at 6.80:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.088) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #645C16 |
| RGB | rgb(100, 92, 22) |
| HSL | hsl(54, 64%, 24%) |
| OKLCH | oklch(46.9% 0.088 102.6) |
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 #645C16 | 6.80:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #645C16 | 3.08:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #645C16 text on white | 6.80:1 | AA | Lc 83.4 | Fine for body text |
| #645C16 text on black | 3.08:1 | AA large text | Lc -18.5 | 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 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
#DCDAC8
oklch(88.5% 0.024 101.7)
-
Step 300
300
#C5C2A3
oklch(80.8% 0.042 102.7)
-
Step 400
400
#A8A371
oklch(70.7% 0.068 103.1)
-
Step 500
500
#938C4A
oklch(63.1% 0.088 103.2)
-
Step 600
600
#7E752C
oklch(55.6% 0.094 102.3)
-
Step 700
700 (this color)
#645C16
oklch(46.9% 0.088 102.6)
-
Step 800
800
#57501B
oklch(42.7% 0.073 101.8)
-
Step 900
900
#47431C
oklch(37.7% 0.058 103.4)
-
Step 950
950
#2A2712
oklch(27% 0.035 101.2)
#645C16 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) | #655909 | 0.009 |
| Deuteranopia (no green cones) | #685C1B | 0.008 |
| Tritanopia (no blue cones) | #6C554E | 0.080 |
| Achromatopsia (no color) | #5B5B5B | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645C16
#645C16
oklch(46.9% 0.088 102.6)
- #53538A
#53538A
oklch(46.8% 0.088 282.4)
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 #645C16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.018
- Olive Brown #645403 ΔE 0.023
- Mud #735C12 ΔE 0.026
- Camo Green #526525 ΔE 0.034
- Mud Green #606602 ΔE 0.034
- Army Green #4B5D16 ΔE 0.039
- Camouflage Green #4B6113 ΔE 0.041
- Dark Olive Green #556B2F ΔE 0.045
Use #645C16 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.