#645A28
Closest named color: Olive Brown (#645403). oklch(46.6% 0.07 98.2), rgb(100, 90, 40).
Aa
White text reads best on this color (6.91:1).
About this color
#645A28 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.070 and its hue 98°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.027 away. White text reads best on it, at 6.91:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.070) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #645A28 |
| RGB | rgb(100, 90, 40) |
| HSL | hsl(50, 43%, 27%) |
| OKLCH | oklch(46.6% 0.07 98.2) |
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 #645A28 | 6.91:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #645A28 | 3.03:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #645A28 text on white | 6.91:1 | AA | Lc 83.9 | Fine for body text |
| #645A28 text on black | 3.03:1 | AA large text | Lc -18.1 | 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
#EBEAE3
oklch(93.6% 0.009 100)
-
Step 200
200
#DCD9CC
oklch(88.4% 0.018 96.1)
-
Step 300
300
#C6C1A9
oklch(80.9% 0.033 97.4)
-
Step 400
400
#A9A17A
oklch(70.6% 0.055 97.9)
-
Step 500
500
#948A58
oklch(63% 0.07 98.3)
-
Step 600
600
#7F743D
oklch(55.6% 0.076 98.3)
-
Step 700
700 (this color)
#645A28
oklch(46.6% 0.07 98.2)
-
Step 800
800
#574F28
oklch(42.6% 0.058 98)
-
Step 900
900
#484225
oklch(37.7% 0.045 97.9)
-
Step 950
950
#2A2716
oklch(27.1% 0.029 99.4)
#645A28 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) | #625823 | 0.008 |
| Deuteranopia (no green cones) | #655B2A | 0.004 |
| Tritanopia (no blue cones) | #6B544F | 0.064 |
| Achromatopsia (no color) | #5A5A5A | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645A28
#645A28
oklch(46.6% 0.07 98.2)
- #505681
#505681
oklch(46.7% 0.07 277.2)
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 #645A28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.027
- Mud #735C12 ΔE 0.031
- Greeny Brown #696006 ΔE 0.034
- Camo Green #526525 ΔE 0.043
- Army Green #4B5D16 ΔE 0.047
- Medium Brown #7F5112 ΔE 0.050
- Mud Green #606602 ΔE 0.050
- Dark Moss Green #606C38 ΔE 0.051
Use #645A28 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.