#645B01
Closest named color: Greeny Brown (#696006). oklch(46.5% 0.097 102.8), rgb(100, 91, 1).
Aa
White text reads best on this color (6.91:1).
About this color
#645B01 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.097 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 6.91:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.097) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #645B01 |
| RGB | rgb(100, 91, 1) |
| HSL | hsl(55, 98%, 20%) |
| OKLCH | oklch(46.5% 0.097 102.8) |
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 #645B01 | 6.91:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #645B01 | 3.03:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #645B01 text on white | 6.91:1 | AA | Lc 83.7 | Fine for body text |
| #645B01 text on black | 3.03:1 | 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
#EBEAE0
oklch(93.5% 0.013 102)
-
Step 200
200
#DCDAC7
oklch(88.5% 0.026 102)
-
Step 300
300
#C6C2A0
oklch(80.8% 0.046 101.8)
-
Step 400
400
#A9A36B
oklch(70.7% 0.076 102.9)
-
Step 500
500
#948C42
oklch(63.1% 0.096 103.1)
-
Step 600
600
#7F751E
oklch(55.5% 0.105 102.6)
-
Step 700
700 (this color)
#645B01
oklch(46.5% 0.097 102.8)
-
Step 800
800
#575012
oklch(42.6% 0.08 102.7)
-
Step 900
900
#484317
oklch(37.8% 0.063 102.8)
-
Step 950
950
#2A270F
oklch(26.9% 0.039 102.2)
#645B01 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) | #655800 | 0.009 |
| Deuteranopia (no green cones) | #675C0B | 0.008 |
| Tritanopia (no blue cones) | #6D534C | 0.090 |
| Achromatopsia (no color) | #5A5A5A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645B01
#645B01
oklch(46.5% 0.097 102.8)
- #52518E
#52518E
oklch(46.5% 0.098 282.7)
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 #645B01, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.017
- Olive Brown #645403 ΔE 0.021
- Mud #735C12 ΔE 0.029
- Mud Green #606602 ΔE 0.033
- Camo Green #526525 ΔE 0.037
- Army Green #4B5D16 ΔE 0.038
- Camouflage Green #4B6113 ΔE 0.039
- Dark Olive Green #556B2F ΔE 0.049
Use #645B01 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.