#645100
Closest named color: Olive Brown (#645403). oklch(44.1% 0.09 93.2), rgb(100, 81, 0).
Aa
White text reads best on this color (7.72:1).
About this color
#645100 is a dark, moderately saturated brown. In OKLCH its lightness is 44%, its chroma 0.090 and its hue 93°. Its hue sits on the warm side of the wheel. The nearest named color is Olive Brown (#645403), ΔE 0.008 away. White text reads best on it, at 7.72:1.
| Hue family | Browns |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.090) |
| Temperature | warm |
| Nearest name | Olive Brown (#645403) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #645100 |
| RGB | rgb(100, 81, 0) |
| HSL | hsl(49, 100%, 20%) |
| OKLCH | oklch(44.1% 0.09 93.2) |
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 #645100 | 7.72:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #645100 | 2.71:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #645100 text on white | 7.72:1 | AAA | Lc 86.7 | Fine for body text |
| #645100 text on black | 2.71:1 | Fails | Lc -15.4 | 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 800.
-
Step 50
50
#F7F5F0
oklch(97% 0.007 88.6)
-
Step 100
100
#EDEADF
oklch(93.6% 0.015 94.2)
-
Step 200
200
#DFD9C4
oklch(88.4% 0.029 93.8)
-
Step 300
300
#CCC09A
oklch(80.8% 0.053 92.6)
-
Step 400
400
#B2A062
oklch(70.7% 0.084 93.8)
-
Step 500
500
#A08831
oklch(63.2% 0.109 93.5)
-
Step 600
600
#8A7100
oklch(55.6% 0.114 93.5)
-
Step 700
700
#745F00
oklch(49.2% 0.101 93.8)
-
Step 800
800 (this color)
#645100
oklch(44.1% 0.09 93.2)
-
Step 900
900
#4E400B
oklch(37.6% 0.07 93.2)
-
Step 950
950
#2E260A
oklch(27.1% 0.044 93.2)
#645100 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) | #5C5000 | 0.015 |
| Deuteranopia (no green cones) | #605507 | 0.012 |
| Tritanopia (no blue cones) | #6D4944 | 0.083 |
| Achromatopsia (no color) | #535353 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645100
#645100
oklch(44.1% 0.09 93.2)
- #434E85
#434E85
oklch(44.1% 0.091 273.5)
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 #645100, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Olive Brown #645403 ΔE 0.008
- Green Brown #544E03 ΔE 0.030
- Mud Brown #60460F ΔE 0.036
- Mud #735C12 ΔE 0.044
- Greeny Brown #696006 ΔE 0.045
- Army Green #4B5D16 ΔE 0.049
- Medium Brown #7F5112 ΔE 0.053
- Camouflage Green #4B6113 ΔE 0.057
Use #645100 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.