#645B16
Closest named color: Olive Brown (#645403). oklch(46.6% 0.087 101.6), rgb(100, 91, 22).
Aa
White text reads best on this color (6.88:1).
About this color
#645B16 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.087 and its hue 102°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.020 away. White text reads best on it, at 6.88:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.087) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 3.04:1 |
| White text | 6.88:1 |
Values
| HEX | #645B16 |
| RGB | rgb(100, 91, 22) |
| HSL | hsl(53, 64%, 24%) |
| OKLCH | oklch(46.6% 0.087 101.6) |
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 #645B16 | 6.88:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #645B16 | 3.04:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #645B16 text on white | 6.88:1 | AA | Lc 83.7 | Fine for body text |
| #645B16 text on black | 3.04:1 | AA large text | Lc -18.2 | 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
#C6C2A3
oklch(80.9% 0.042 101.2)
-
Step 400
400
#A9A271
oklch(70.6% 0.067 101)
-
Step 500
500
#948B4B
oklch(63% 0.086 101.4)
-
Step 600
600
#7F752C
oklch(55.7% 0.094 101.5)
-
Step 700
700 (this color)
#645B16
oklch(46.6% 0.087 101.6)
-
Step 800
800
#57501C
oklch(42.7% 0.072 101.7)
-
Step 900
900
#48431D
oklch(37.9% 0.056 101.9)
-
Step 950
950
#2A2712
oklch(27% 0.035 101.2)
#645B16 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) | #64580A | 0.009 |
| Deuteranopia (no green cones) | #675C1B | 0.007 |
| Tritanopia (no blue cones) | #6C544E | 0.080 |
| Achromatopsia (no color) | #5A5A5A | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B16
#645B16
oklch(46.6% 0.087 101.6)
- #525389
#525389
oklch(46.6% 0.087 281.7)
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 #645B16, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.020
- Greeny Brown #696006 ΔE 0.020
- Mud #735C12 ΔE 0.026
- Camo Green #526525 ΔE 0.036
- Mud Green #606602 ΔE 0.037
- Army Green #4B5D16 ΔE 0.040
- Camouflage Green #4B6113 ΔE 0.042
- Dark Olive Green #556B2F ΔE 0.048
Use #645B16 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.